5ZWN

Cryo-EM structure of the yeast pre-B complex at an average resolution of 3.3 angstrom (Part II: U1 snRNP region)


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
J [auth a]SCOP2B SuperfamilySm-like ribonucleoproteins8077613 3000419 SCOP2B (2022-06-29)
K [auth b]SCOP2B SuperfamilySm-like ribonucleoproteins8082631 3000419 SCOP2B (2022-06-29)
O [auth f]SCOP2B SuperfamilySm-like ribonucleoproteins8043703 3000419 SCOP2B (2022-06-29)
P [auth g]SCOP2B SuperfamilySm-like ribonucleoproteins8098668 3000419 SCOP2B (2022-06-29)
L [auth c]SCOP2B SuperfamilySm-like ribonucleoproteins8063490 3000419 SCOP2B (2022-06-29)
M [auth d]SCOP2B SuperfamilySm-like ribonucleoproteins8098694 3000419 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
F [auth T]F_UNCLASSIFIEDe5zwnT1 A: alpha superhelicesX: Repetitive alpha hairpinsH: ARM repeat (From Topology)T: ARM repeatF: F_UNCLASSIFIEDECOD (1.6)
K [auth b]PF01423e5zwnb1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)
N [auth e]PF01423e5zwne1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)
O [auth f]PF01423e5zwnf1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)
P [auth g]PF01423e5zwng1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)
T [auth y]PF00270e5zwny1 A: a/b three-layered sandwichesX: P-loop domains-likeH: P-loop domains-relatedT: P-loop containing nucleoside triphosphate hydrolasesF: PF00270ECOD (1.6)
T [auth y]PF00271e5zwny2 A: a/b three-layered sandwichesX: P-loop domains-likeH: P-loop domains-relatedT: P-loop containing nucleoside triphosphate hydrolasesF: PF00271ECOD (1.6)
L [auth c]PF01423e5zwnc1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)
M [auth d]PF01423e5zwnd1 A: beta barrelsX: SH3H: SH3T: SH3F: PF01423ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
N [auth e]2.30.30.100 Mainly Beta Roll SH3 type barrels. CATH (4.3.0)
O [auth f]2.30.30.100 Mainly Beta Roll SH3 type barrels. CATH (4.3.0)
P [auth g]2.30.30.100 Mainly Beta Roll SH3 type barrels. CATH (4.3.0)
S [auth x]1.20.5.190 Mainly Alpha Up-down Bundle Single alpha-helices involved in coiled-coils or other helix-helix interfaces CATH (4.3.0)
L [auth c]2.30.30.100 Mainly Beta Roll SH3 type barrels. CATH (4.3.0)
M [auth d]2.30.30.100 Mainly Beta Roll SH3 type barrels. CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
C [auth Q]PF12220U1 small nuclear ribonucleoprotein of 70kDa MW N terminal (U1snRNP70_N)U1 small nuclear ribonucleoprotein of 70kDa MW N terminal- Family
C [auth Q]PF00076RNA recognition motif (RRM_1)RNA recognition motifThe RRM motif (a.k.a. RRM, RBD, or RNP domain) 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 pro ...The RRM motif (a.k.a. RRM, RBD, or RNP domain) 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
H [auth V]PF00076RNA recognition motif (RRM_1)RNA recognition motifThe RRM motif (a.k.a. RRM, RBD, or RNP domain) 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 pro ...The RRM motif (a.k.a. RRM, RBD, or RNP domain) 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
I [auth W]PF19097Snu56-like U1 small nuclear ribonucleoprotein component (Snu56_snRNP)Snu56-like U1 small nuclear ribonucleoprotein component- Family
J [auth a]PF01423LSM 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
K [auth b]PF01423LSM 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
N [auth e]PF01423LSM 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
O [auth f]PF01423LSM 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
P [auth g]PF01423LSM 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
R [auth Y]PF03194LUC7 N_terminus (LUC7)LUC7 N_terminus- Family
T [auth y]PF00270DEAD/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
T [auth y]PF00271Helicase 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
L [auth c]PF01423LSM 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
M [auth d]PF01423LSM 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
D [auth R]PF06220U1 zinc finger (zf-U1)U1 zinc fingerThis family consists of several U1 small nuclear ribonucleoprotein C (U1-C) proteins. The U1 small nuclear ribonucleoprotein (U1 snRNP) binds to the pre-mRNA 5' splice site (ss) at early stages of spliceosome assembly. Recruitment of U1 to a class o ...This family consists of several U1 small nuclear ribonucleoprotein C (U1-C) proteins. The U1 small nuclear ribonucleoprotein (U1 snRNP) binds to the pre-mRNA 5' splice site (ss) at early stages of spliceosome assembly. Recruitment of U1 to a class of weak 5' ss is promoted by binding of the protein TIA-1 to uridine-rich sequences immediately downstream from the 5' ss. Binding of TIA-1 in the vicinity of a 5' ss helps to stabilise U1 snRNP recruitment, at least in part, via a direct interaction with U1-C, thus providing one molecular mechanism for the function of this splicing regulator [1]. This domain is probably a zinc-binding. It is found in multiple copies in some members of the family.
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth G]pre-mRNA---
B [auth P]U1 snRNA---
C [auth Q]U1 small nuclear ribonucleoprotein 70 kDa homolog
E [auth S]U1 small nuclear ribonucleoprotein A
F [auth T]U1 small nuclear ribonucleoprotein component PRP42
H [auth V]Protein NAM8
I [auth W]56 kDa U1 small nuclear ribonucleoprotein component
J [auth a]Small nuclear ribonucleoprotein-associated protein B
K [auth b]Small nuclear ribonucleoprotein Sm D1
N [auth e]Small nuclear ribonucleoprotein E
O [auth f]Small nuclear ribonucleoprotein F
P [auth g]Small nuclear ribonucleoprotein G
Q [auth X]U1 small nuclear ribonucleoprotein component SNU71
R [auth Y]Protein LUC7
S [auth x]U1 snRNP---
T [auth y]Pre-mRNA-splicing ATP-dependent RNA helicase PRP28
L [auth c]Small nuclear ribonucleoprotein Sm D2
M [auth d]Small nuclear ribonucleoprotein Sm D3
D [auth R]U1 small nuclear ribonucleoprotein C
G [auth U]Pre-mRNA-processing factor 39-

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
C [auth Q]IPR000504RNA recognition motif domainDomain
C [auth Q]IPR022023U1 small nuclear ribonucleoprotein of 70kDa N-terminalDomain
C [auth Q]IPR012677Nucleotide-binding alpha-beta plait domain superfamilyHomologous Superfamily
C [auth Q]IPR035979RNA-binding domain superfamilyHomologous Superfamily
E [auth S]IPR012677Nucleotide-binding alpha-beta plait domain superfamilyHomologous Superfamily
E [auth S]IPR000504RNA recognition motif domainDomain
E [auth S]IPR035979RNA-binding domain superfamilyHomologous Superfamily
F [auth T]IPR003107HAT (Half-A-TPR) repeatRepeat
F [auth T]IPR011990Tetratricopeptide-like helical domain superfamilyHomologous Superfamily
H [auth V]IPR000504RNA recognition motif domainDomain
H [auth V]IPR012677Nucleotide-binding alpha-beta plait domain superfamilyHomologous Superfamily
H [auth V]IPR035979RNA-binding domain superfamilyHomologous Superfamily
I [auth W]IPR043954Snu56-like U1 small nuclear ribonucleoprotein componentFamily
J [auth a]IPR001163Sm domain, eukaryotic/archaea-typeDomain
J [auth a]IPR047575Sm domainDomain
J [auth a]IPR010920LSM domain superfamilyHomologous Superfamily
K [auth b]IPR027141Like-Sm (LSM) domain containing protein, LSm4/SmD1/SmD3Family
K [auth b]IPR001163Sm domain, eukaryotic/archaea-typeDomain
K [auth b]IPR047575Sm domainDomain
K [auth b]IPR010920LSM domain superfamilyHomologous Superfamily
N [auth e]IPR027078Small nuclear ribonucleoprotein EFamily
N [auth e]IPR001163Sm domain, eukaryotic/archaea-typeDomain
N [auth e]IPR047575Sm domainDomain
N [auth e]IPR010920LSM domain superfamilyHomologous Superfamily
O [auth f]IPR016487Sm-like protein Lsm6/SmFFamily
O [auth f]IPR034100Small nuclear ribonucleoprotein FFamily
O [auth f]IPR001163Sm domain, eukaryotic/archaea-typeDomain
O [auth f]IPR047575Sm domainDomain
O [auth f]IPR010920LSM domain superfamilyHomologous Superfamily
P [auth g]IPR044641Sm-like protein Lsm7/SmGFamily
P [auth g]IPR034098Small nuclear ribonucleoprotein GFamily
P [auth g]IPR001163Sm domain, eukaryotic/archaea-typeDomain
P [auth g]IPR047575Sm domainDomain
P [auth g]IPR010920LSM domain superfamilyHomologous Superfamily
Q [auth X]IPR002483PWI domainDomain
R [auth Y]IPR004882Luc7-relatedFamily
T [auth y]IPR001650Helicase, C-terminal domain-likeDomain
T [auth y]IPR000629ATP-dependent RNA helicase DEAD-box, conserved siteConserved Site
T [auth y]IPR014001Helicase superfamily 1/2, ATP-binding domainDomain
T [auth y]IPR011545DEAD/DEAH box helicase domainDomain
T [auth y]IPR027417P-loop containing nucleoside triphosphate hydrolaseHomologous Superfamily
L [auth c]IPR001163Sm domain, eukaryotic/archaea-typeDomain
L [auth c]IPR047575Sm domainDomain
L [auth c]IPR027248Small nuclear ribonucleoprotein Sm D2Family
L [auth c]IPR010920LSM domain superfamilyHomologous Superfamily
M [auth d]IPR027141Like-Sm (LSM) domain containing protein, LSm4/SmD1/SmD3Family
M [auth d]IPR034099Small nuclear ribonucleoprotein Sm D3Family
M [auth d]IPR001163Sm domain, eukaryotic/archaea-typeDomain
M [auth d]IPR047575Sm domainDomain
M [auth d]IPR010920LSM domain superfamilyHomologous Superfamily
D [auth R]IPR003604Matrin/U1-C-like, C2H2-type zinc fingerDomain
D [auth R]IPR036236Zinc finger C2H2 superfamilyHomologous Superfamily
D [auth R]IPR000690Matrin/U1-C, C2H2-type zinc fingerDomain
D [auth R]IPR013085U1-C, C2H2-type zinc fingerDomain
D [auth R]IPR017340U1 small nuclear ribonucleoprotein CFamily
G [auth U]IPR003107HAT (Half-A-TPR) repeatRepeat
G [auth U]IPR011990Tetratricopeptide-like helical domain superfamilyHomologous Superfamily