5XJC

Cryo-EM structure of the human spliceosome just prior to exon ligation at 3.6 angstrom


Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
APF10597U5-snRNA binding site 2 of PrP8 (U5_2-snRNA_bdg)U5-snRNA binding site 2 of PrP8The essential spliceosomal protein Prp8 interacts with U5 and U6 snRNAs and with specific pre-mRNA sequences that participate in catalysis [1]. This close association with crucial RNA sequences, together with extensive genetic evidence, suggests that ...The essential spliceosomal protein Prp8 interacts with U5 and U6 snRNAs and with specific pre-mRNA sequences that participate in catalysis [1]. This close association with crucial RNA sequences, together with extensive genetic evidence, suggests that Prp8 could directly affect the function of the catalytic core, perhaps acting as a splicing cofactor [2].
Domain
APF10598RNA recognition motif of the spliceosomal PrP8 (RRM_4)RNA recognition motif of the spliceosomal PrP8The large RNA-protein complex of the spliceosome catalyses pre-mRNA splicing. One of the most conserved core proteins is PrP8 which occupies a central position in the catalytic core of the spliceosome, and has been implicated in several crucial molec ...The large RNA-protein complex of the spliceosome catalyses pre-mRNA splicing. One of the most conserved core proteins is PrP8 which occupies a central position in the catalytic core of the spliceosome, and has been implicated in several crucial molecular rearrangements that occur there, and has recently come under the spotlight for its role in the inherited human disease, Retinitis Pigmentosa [1]. The RNA-recognition motif of PrP8 is highly conserved and provides a possible RNA binding centre for the 5-prime SS, BP, or 3-prime SS of pre-mRNA which are known to contact with Prp8. The most conserved regions of an RRM are defined as the RNP1 and RNP2 sequences. Recognition of RNA targets can also be modulated by a number of other factors, most notably the two loops beta1-alpha1, beta2-beta3 and the amino acid residues C-terminal to the RNP2 domain [2].
Domain
APF10596U6-snRNA interacting domain of PrP8 (U6-snRNA_bdg)U6-snRNA interacting domain of PrP8This domain incorporates the interacting site for the U6-snRNA as part of the U4/U6.U5 tri-snRNPs complex of the spliceosome, and is the prime candidate for the role of cofactor for the spliceosome's RNA core. The essential spliceosomal protein Prp8 ...This domain incorporates the interacting site for the U6-snRNA as part of the U4/U6.U5 tri-snRNPs complex of the spliceosome, and is the prime candidate for the role of cofactor for the spliceosome's RNA core. The essential spliceosomal protein Prp8 interacts with U5 and U6 snRNAs and with specific pre-mRNA sequences that participate in catalysis. This close association with crucial RNA sequences, together with extensive genetic evidence, suggests that Prp8 could directly affect the function of the catalytic core, perhaps acting as a splicing cofactor [1].
Domain
APF12134PRP8 domain IV core (PRP8_domainIV)PRP8 domain IV coreThis domain is found in eukaryotes, and is about 20 amino acids in length. It is found associated with Pfam:PF10597, Pfam:PF10596, Pfam:PF10598, Pfam:PF08083, Pfam:PF08082, Pfam:PF01398, Pfam:PF08084. There is a conserved LILR sequence motif. The dom ...This domain is found in eukaryotes, and is about 20 amino acids in length. It is found associated with Pfam:PF10597, Pfam:PF10596, Pfam:PF10598, Pfam:PF08083, Pfam:PF08082, Pfam:PF01398, Pfam:PF08084. There is a conserved LILR sequence motif. The domain is a selenomethionine domain in a subunit of the spliceosome. The function of PRP8 domain IV is believed to be interaction with the splicosomal core.
Domain
APF08082PRO8NT (NUC069), PrP8 N-terminal domain (PRO8NT)PRO8NT (NUC069), PrP8 N-terminal domainThe PRO8NT domain is found at the N-terminus of pre-mRNA splicing factors of PRO8 family [1]. The NLS or nuclear localisation signal for these spliceosome proteins begins at the start and runs for 60 residues. N-terminal to this domain is a highly va ...The PRO8NT domain is found at the N-terminus of pre-mRNA splicing factors of PRO8 family [1]. The NLS or nuclear localisation signal for these spliceosome proteins begins at the start and runs for 60 residues. N-terminal to this domain is a highly variable proline-rich region [4].
Domain
APF08083PROCN (NUC071) domain (PROCN)PROCN (NUC071) domainThe PROCN domain is the central domain in pre-mRNA splicing factors of PRO8 family [1].Domain
APF01398JAB1/Mov34/MPN/PAD-1 ubiquitin protease (JAB)JAB1/Mov34/MPN/PAD-1 ubiquitin protease- Family
APF08084PROCT (NUC072) domain (PROCT)PROCT (NUC072) domainThe PROCT domain is the C-terminal domain in pre-mRNA splicing factors of PRO8 family [1].Domain
CPF00679Elongation factor G C-terminus (EFG_C)Elongation factor G C-terminusThis domain includes the carboxyl terminal regions of Elongation factor G, elongation factor 2 and some tetracycline resistance proteins and adopt a ferredoxin-like fold.Domain
CPF00009Elongation factor Tu GTP binding domain (GTP_EFTU)Elongation factor Tu GTP binding domainThis domain contains a P-loop motif, also found in several other families such as Pfam:PF00071, Pfam:PF00025 and Pfam:PF00063. Elongation factor Tu consists of three structural domains, this plus two C-terminal beta barrel domains.Domain
CPF14492Elongation Factor G, domain III (EFG_III)Elongation Factor G, domain IIIThis domain is found in Elongation Factor G. It shares a similar structure with domain V (Pfam:PF00679). Structural studies in drosophila indicate this is domain 3 [1].Domain
CPF16004116 kDa U5 small nuclear ribonucleoprotein component N-terminus (EFTUD2)116 kDa U5 small nuclear ribonucleoprotein component N-terminus- Family
CPF03144Elongation factor Tu domain 2 (GTP_EFTU_D2)Elongation factor Tu domain 2Elongation factor Tu consists of three structural domains, this is the second domain. This domain adopts a beta barrel structure. This the second domain is involved in binding to charged tRNA [1]. This domain is also found in other proteins such as e ...Elongation factor Tu consists of three structural domains, this is the second domain. This domain adopts a beta barrel structure. This the second domain is involved in binding to charged tRNA [1]. This domain is also found in other proteins such as elongation factor G and translation initiation factor IF-2. This domain is structurally related to Pfam:PF03143, and in fact has weak sequence matches to this domain.
Domain
CPF03764Elongation factor G, domain IV (EFG_IV)Elongation factor G, domain IVThis domain is found in elongation factor G, elongation factor 2 and some tetracycline resistance proteins and adopts a ribosomal protein S5 domain 2-like fold.Domain
DPF02889Sec63 Brl domain (Sec63)Sec63 Brl domain- Family
DPF00270DEAD/DEAH box helicase (DEAD)DEAD/DEAH box helicaseMembers of this family include the DEAD and DEAH box helicases. Helicases are involved in unwinding nucleic acids. The DEAD box helicases are involved in various aspects of RNA metabolism, including nuclear transcription, pre mRNA splicing, ribosome ...Members of this family include the DEAD and DEAH box helicases. Helicases are involved in unwinding nucleic acids. The DEAD box helicases are involved in various aspects of RNA metabolism, including nuclear transcription, pre mRNA splicing, ribosome biogenesis, nucleocytoplasmic transport, translation, RNA decay and organellar gene expression.
Domain
DPF00271Helicase conserved C-terminal domain (Helicase_C)Helicase conserved C-terminal domainThe Prosite family is restricted to DEAD/H helicases, whereas this domain family is found in a wide variety of helicases and helicase related proteins. It may be that this is not an autonomously folding unit, but an integral part of the helicase.Domain
DPF18149N-terminal helicase PWI domain (Helicase_PWI)N-terminal helicase PWI domainThis domain is found in spliceosomal RNA helicase Brr2. Brr2 is required for the assembly of a catalytically active spliceosome on a messenger RNA precursor. The domain is found in the N-terminal region and is non-canonically PWI-like. The PWI-like d ...This domain is found in spliceosomal RNA helicase Brr2. Brr2 is required for the assembly of a catalytically active spliceosome on a messenger RNA precursor. The domain is found in the N-terminal region and is non-canonically PWI-like. The PWI-like domain is thought to be involved in protein-protein interactions [1].
Domain
EPF00400WD domain, G-beta repeat (WD40)WD domain, G-beta repeat- Repeat
IPF13181Tetratricopeptide repeat (TPR_8)Tetratricopeptide repeat- Repeat
JPF02184HAT (Half-A-TPR) repeat (HAT)HAT (Half-A-TPR) repeat- Repeat
KPF05700Breast carcinoma amplified sequence 2 (BCAS2) (BCAS2)Breast carcinoma amplified sequence 2 (BCAS2)- Family
LPF11831pre-mRNA splicing factor component (Myb_Cef)pre-mRNA splicing factor component- Family
MPF08231SYF2 splicing factor (SYF2)SYF2 splicing factorProteins in this family are involved in cell cycle progression and pre-mRNA splicing [1] [2].Domain
NPF01125G10 protein (G10)G10 protein- Domain
PPF04889Cwf15/Cwc15 cell cycle control protein (Cwf_Cwc_15)Cwf15/Cwc15 cell cycle control protein- Family
QPF13086AAA domain (AAA_11)AAA domainThis family of domains contain a P-loop motif that is characteristic of the AAA superfamily. Many of the proteins in this family are conjugative transfer proteins.Domain
QPF13087AAA domain (AAA_12)AAA domainThis family of domains contain a P-loop motif that is characteristic of the AAA superfamily. Many of the proteins in this family are conjugative transfer proteins.Domain
QPF16399Intron-binding protein aquarius N-terminus (Aquarius_N)Intron-binding protein aquarius N-terminus- Family
RPF02731SKIP/SNW domain (SKIP_SNW)SKIP/SNW domain- Family
SPF00160Cyclophilin type peptidyl-prolyl cis-trans isomerase/CLD (Pro_isomerase)Cyclophilin type peptidyl-prolyl cis-trans isomerase/CLDThe peptidyl-prolyl cis-trans isomerases, also known as cyclophilins, share this domain of about 109 amino acids. Cyclophilins have been found in all organisms studied so far and catalyse peptidyl-prolyl isomerisation during which the peptide bond pr ...The peptidyl-prolyl cis-trans isomerases, also known as cyclophilins, share this domain of about 109 amino acids. Cyclophilins have been found in all organisms studied so far and catalyse peptidyl-prolyl isomerisation during which the peptide bond preceding proline (the peptidyl-prolyl bond) is stabilised in the cis conformation. Mammalian cyclophilin A (CypA) is a major cellular target for the immunosuppressive drug cyclosporin A (CsA). Other roles for cyclophilins may include chaperone and cell signalling function [1].
Domain
TPF00400WD domain, G-beta repeat (WD40)WD domain, G-beta repeat- Repeat
UPF08312cwf21 domain (cwf21)cwf21 domainThe cwf21 family is involved in mRNA splicing. It has been isolated as a subcomplex of the splicosome in Schizosaccharomyces pombe [1]. The function of the cwf21 domain is to bind directly to the spliceosomal protein Prp8. Mutations in the cwf21 dom ...The cwf21 family is involved in mRNA splicing. It has been isolated as a subcomplex of the splicosome in Schizosaccharomyces pombe [1]. The function of the cwf21 domain is to bind directly to the spliceosomal protein Prp8. Mutations in the cwf21 domain prevent Prp8 from binding [2]. The structure of this domain has recently been solved which shows this domain to be composed of two alpha helices.
Domain
VPF02847MA3 domain (MA3)MA3 domain- Repeat
WPF00400WD domain, G-beta repeat (WD40)WD domain, G-beta repeat- Repeat
XPF06658Protein of unknown function (DUF1168) (DUF1168)Protein of unknown function (DUF1168)- Family
YPF04408Helicase associated domain (HA2) (HA2)Helicase associated domain (HA2)This presumed domain is about 90 amino acid residues in length. It is found is a diverse set of RNA helicases. Its function is unknown, however it seems likely to be involved in nucleic acid binding.Domain
YPF07717Oligonucleotide/oligosaccharide-binding (OB)-fold (OB_NTP_bind)Oligonucleotide/oligosaccharide-binding (OB)-foldThis family is found towards the C-terminus of the DEAD-box helicases (Pfam:PF00270). In these helicases it is apparently always found in association with Pfam:PF04408. There do seem to be a couple of instances where it occurs by itself - e.g. Swiss: ...This family is found towards the C-terminus of the DEAD-box helicases (Pfam:PF00270). In these helicases it is apparently always found in association with Pfam:PF04408. There do seem to be a couple of instances where it occurs by itself - e.g. Swiss:Q84VZ2. The structure PDB:3i4u adopts an OB-fold. helicases (Pfam:PF00270). In these helicases it is apparently always found in association with Pfam:PF04408. This C-terminal domain of the yeast helicase contains an oligonucleotide/oligosaccharide-binding (OB)-fold which seems to be placed at the entrance of the putative nucleic acid cavity. It also constitutes the binding site for the G-patch-containing domain of Pfa1p. When found on DEAH/RHA helicases, this domain is central to the regulation of the helicase activity through its binding of both RNA and G-patch domain proteins [1].
Domain
YPF00271Helicase conserved C-terminal domain (Helicase_C)Helicase conserved C-terminal domainThe Prosite family is restricted to DEAD/H helicases, whereas this domain family is found in a wide variety of helicases and helicase related proteins. It may be that this is not an autonomously folding unit, but an integral part of the helicase.Domain
YPF00575S1 RNA binding domain (S1)S1 RNA binding domainThe S1 domain occurs in a wide range of RNA associated proteins. It is structurally similar to cold shock protein which binds nucleic acids. The S1 domain has an OB-fold structure.Domain
ZPF11708Pre-mRNA splicing Prp18-interacting factor (Slu7)Pre-mRNA splicing Prp18-interacting factorThe spliceosome, an assembly of snRNAs (U1, U2, U4/U6, and U5) and proteins, catalyses the excision of introns from pre-mRNAs in two successive trans-esterification reactions. Step 2 depends upon integral spliceosome constituents such as U5 snRNA and ...The spliceosome, an assembly of snRNAs (U1, U2, U4/U6, and U5) and proteins, catalyses the excision of introns from pre-mRNAs in two successive trans-esterification reactions. Step 2 depends upon integral spliceosome constituents such as U5 snRNA and Prp8 and non-spliceosomal proteins Prp16, Slu7, Prp18, and Prp22. ATP hydrolysis by the DEAH-box enzyme Prp16 promotes a conformational change in the spliceosome that leads to protection of the 3'ss from targeted RNase H cleavage. This change, which probably reflects binding of the 3'ss PyAG in the catalytic centre of the spliceosome, requires the ordered recruitment of Slu7, Prp18, and Prp22 to the spliceosome. There is a close functional relationship between Prp8, Prp18, and Slu7, and Prp18 interacts with Slu7, so that together they recruit Prp22 to the spliceosome. Most members of the family carry a zinc-finger of the CCHC-type upstream of this domain.
Domain
AA, HAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
CA, JAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
DA, KAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
EA, LAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
FA, MAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
GA, NAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain
PAPF00076RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain) (RRM_1)RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain)The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The mo ...The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins (Swiss:P05455) have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteristic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins (Swiss:P05455) are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.
Domain
QA, RA, SA, TAPF08606Prp19/Pso4-like (Prp19)Prp19/Pso4-likeThis regions is found specifically in PRP19-like protein. The region represented by this family covers the sequence implicated in self-interaction and a coiled-coiled motif [1]. PRP19-like proteins form an oligomer that is necessary ...This regions is found specifically in PRP19-like protein. The region represented by this family covers the sequence implicated in self-interaction and a coiled-coiled motif [1]. PRP19-like proteins form an oligomer that is necessary for spliceosome assembly [1].
Domain
QA, RA, SA, TAPF04564U-box domain (U-box)U-box domainThe U-box is a domain of ~70 amino acids that is present in proteins from yeast to human. It consists of the beta-beta-alpha-beta-alpha- fold typical of U-box and RING domains. The central alpha helix is flanked by two prominent surface-exposed loop ...The U-box is a domain of ~70 amino acids that is present in proteins from yeast to human. It consists of the beta-beta-alpha-beta-alpha- fold typical of U-box and RING domains. The central alpha helix is flanked by two prominent surface-exposed loop regions. This domain is one class of E3 ligases, involved in the ubiquitination process [1-3]. This domain is related to the Ring finger Pfam:PF00097 but lacks the zinc binding residues [4].
Domain
QA, RA, SA, TAPF00400WD domain, G-beta repeat (WD40)WD domain, G-beta repeat- Repeat
UAPF00270DEAD/DEAH box helicase (DEAD)DEAD/DEAH box helicaseMembers of this family include the DEAD and DEAH box helicases. Helicases are involved in unwinding nucleic acids. The DEAD box helicases are involved in various aspects of RNA metabolism, including nuclear transcription, pre mRNA splicing, ribosome ...Members of this family include the DEAD and DEAH box helicases. Helicases are involved in unwinding nucleic acids. The DEAD box helicases are involved in various aspects of RNA metabolism, including nuclear transcription, pre mRNA splicing, ribosome biogenesis, nucleocytoplasmic transport, translation, RNA decay and organellar gene expression.
Domain
UAPF00271Helicase conserved C-terminal domain (Helicase_C)Helicase conserved C-terminal domainThe Prosite family is restricted to DEAD/H helicases, whereas this domain family is found in a wide variety of helicases and helicase related proteins. It may be that this is not an autonomously folding unit, but an integral part of the helicase.Domain
VAPF02792Mago nashi protein (Mago_nashi)Mago nashi protein- Family
WAPF00076RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain) (RRM_1)RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain)The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The mo ...The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins (Swiss:P05455) have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteristic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins (Swiss:P05455) are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.
Domain
XAPF09405CASC3/Barentsz eIF4AIII binding (Btz)CASC3/Barentsz eIF4AIII bindingThis domain is found on CASC3 (cancer susceptibility candidate gene 3 protein) which is also known as Barentsz (Btz). CASC3 is a component of the EJC (exon junction complex) which is a complex that is involved in post-transcriptional regulation of m ...This domain is found on CASC3 (cancer susceptibility candidate gene 3 protein) which is also known as Barentsz (Btz). CASC3 is a component of the EJC (exon junction complex) which is a complex that is involved in post-transcriptional regulation of mRNA in metazoa. The complex is formed by the association of four proteins (eIF4AIII, Barentsz, Mago, and Y14), mRNA, and ATP. This domain wraps around eIF4AIII and stacks against the 5' nucleotide [1][2].
Domain
OPF00076RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain) (RRM_1)RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain)The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The mo ...The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins (Swiss:P05455) have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteristic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins (Swiss:P05455) are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.
Domain
BA, IAPF01423LSM domain (LSM)LSM domainThe LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) i ...The LSM domain contains Sm proteins as well as other related LSM (Like Sm) proteins. The U1, U2, U4/U6, and U5 small nuclear ribonucleoprotein particles (snRNPs) involved in pre-mRNA splicing contain seven Sm proteins (B/B', D1, D2, D3, E, F and G) in common, which assemble around the Sm site present in four of the major spliceosomal small nuclear RNAs. The U6 snRNP binds to the LSM (Like Sm) proteins [3]. Sm proteins are also found in archaebacteria, which do not have any splicing apparatus suggesting a more general role for Sm proteins. All Sm proteins contain a common sequence motif in two segments, Sm1 and Sm2, separated by a short variable linker. This family also includes the bacterial Hfq (host factor Q) proteins. Hfq are also RNA-binding proteins, that form hexameric rings.
Domain

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
APre-mRNA-processing-splicing factor 8
BU5 snRNAnone none none
C116 kDa U5 small nuclear ribonucleoprotein component
DU5 small nuclear ribonucleoprotein 200 kDa helicase
EU5 small nuclear ribonucleoprotein 40 kDa protein
FU6 snRNAnone none none
Gpre-mRNAnone none none
HHomo sapiens small nuclear RNA (U2) genenone none none
IPre-mRNA-splicing factor SYF1
JCrooked neck-like protein 1
KPre-mRNA-splicing factor SPF27
LCell division cycle 5-like protein
MPre-mRNA-splicing factor SYF2
NProtein BUD31 homolog
PSpliceosome-associated protein CWC15 homolog
QIntron-binding protein aquarius
RSNW domain-containing protein 1
SPeptidyl-prolyl cis-trans isomerase-like 1
TPleiotropic regulator 1
USerine/arginine repetitive matrix protein 2
VPre-mRNA-splicing factor CWC22 homolog
WPre-mRNA-processing factor 17
XPRKR-interacting protein 1
YATP-dependent RNA helicase DHX8
ZPre-mRNA-splicing factor SLU7
a, hSmall nuclear ribonucleoprotein Sm D3
c, jSmall nuclear ribonucleoprotein Sm D1
d, kSmall nuclear ribonucleoprotein Sm D2
f, mSmall nuclear ribonucleoprotein F
e, lSmall nuclear ribonucleoprotein E
g, nSmall nuclear ribonucleoprotein G
oU2 small nuclear ribonucleoprotein A'
pU2 small nuclear ribonucleoprotein B''
q, r, s, tPre-mRNA-processing factor 19
uEukaryotic initiation factor 4A-III
vProtein mago nashi homolog 2
wRNA-binding protein 8A
xProtein CASC3
OPre-mRNA-splicing factor RBM22
b, iSmall nuclear ribonucleoprotein-associated proteins B and B'

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
GUNK
RSEP Parent Component: SER

RESIDAA0037

PSI-MOD :  O-phospho-L-serine MOD:00046