1I8F

THE CRYSTAL STRUCTURE OF A HEPTAMERIC ARCHAEAL SM PROTEIN: IMPLICATIONS FOR THE EUKARYOTIC SNRNP CORE

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1i8fa_	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
G	d1i8fg_	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
B	d1i8fb_	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
C	d1i8fc1	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
C	d1i8fc2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
D	d1i8fd1	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
D	d1i8fd2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
E	d1i8fe_	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
F	d1i8ff1	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	Sm motif of small nuclear ribonucleoproteins, SNRNP	Archaeal homoheptameric Sm protein	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)
F	d1i8ff2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Pyrobaculum aerophilum ) [TaxId: 13773 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Sm motif of small nuclear ribonucleoproteins SNRNP	8021402	4001809	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2 (2022-06-29)
G	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Sm-like ribonucleoproteins	8033782	3000419	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF01423	e1i8fA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
G	PF01423	e1i8fG1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
B	PF01423	e1i8fB1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
C	PF01423	e1i8fC1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
D	PF01423	e1i8fD1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
E	PF01423	e1i8fE1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
F	PF01423	e1i8fF1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
G	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
B	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
C	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
D	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
E	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)
F	2.30.30.100	Mainly Beta	Roll	SH3 type barrels.		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G	PF01423	LSM domain (LSM)	LSM domain	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) 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 Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G	PUTATIVE SNRNP SM-LIKE PROTEIN	RNA binding binding organic cyclic compound binding nucleic acid binding	RNA splicing cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process gene expression mRNA processing mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process biosynthetic process RNA splicing, via transesterification reactions RNA splicing cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process gene expression mRNA processing mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process biosynthetic process RNA splicing, via transesterification reactions mRNA splicing, via spliceosome organic substance biosynthetic process metabolic process cellular process RNA splicing, via transesterification reactions with bulged adenosine as nucleophile macromolecule metabolic process RNA processing	intracellular organelle intracellular anatomical structure organelle cellular anatomical entity protein-containing complex ribonucleoprotein complex Sm-like protein family complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G	IPR001163	Sm domain, eukaryotic/archaea-type	Domain
A, B, C, D, E A, B, C, D, E, F, G	IPR016487	Sm-like protein Lsm6/SmF	Family
A, B, C, D, E A, B, C, D, E, F, G	IPR010920	LSM domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G	IPR047575	Sm domain	Domain
A, B, C, D, E A, B, C, D, E, F, G	IPR022901	snRNP Sm-like, putative, archaea	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.