3BW1

Crystal structure of homomeric yeast Lsm3 exhibiting novel octameric ring organisation

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	d3bw1a1	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	automated matches	automated matches	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d3bw1a2	Artifacts	Tags	Tags	Tags	N-terminal Tags	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d3bw1b1	All beta proteins	Sm-like fold	Sm-like ribonucleoproteins	automated matches	automated matches	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d3bw1b2	Artifacts	Tags	Tags	Tags	N-terminal Tags	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Sm-like ribonucleoproteins	8063446	3000419	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Sm-like ribonucleoproteins	8063446	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	e3bw1A1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF01423	ECOD (1.6)
B	PF01423	e3bw1B1	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)
B	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	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	U6 snRNA-associated Sm-like protein LSm3	RNA binding binding organic cyclic compound binding nucleic acid binding	regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression regulation of RNA metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological quality RNA catabolic process mRNA catabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression regulation of RNA metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological quality RNA catabolic process mRNA catabolic process regulation of biological process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process negative regulation of metabolic process positive regulation of mRNA metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process nucleobase-containing compound catabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process deadenylation-dependent decapping of nuclear-transcribed mRNA regulation of metabolic process RNA decapping nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay catabolic process cellular biosynthetic process positive regulation of biological process RNA metabolic process macromolecule catabolic process mRNA destabilization organic substance metabolic process regulation of mRNA catabolic process negative regulation of cellular process mRNA methylguanosine-cap decapping negative regulation of macromolecule metabolic process regulation of biosynthetic process nuclear-transcribed mRNA catabolic process RNA destabilization biological regulation regulation of macromolecule metabolic process regulation of catabolic process gene expression mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process organic cyclic compound catabolic process regulation of cellular biosynthetic process positive regulation of catabolic process regulation of mRNA stability negative regulation of biosynthetic process positive regulation of mRNA catabolic process regulation of RNA stability cellular process regulation of mRNA metabolic process organic substance catabolic process RNA splicing mRNA processing RNA splicing, via transesterification reactions mRNA splicing, via spliceosome RNA splicing, via transesterification reactions with bulged adenosine as nucleophile RNA processing ribonucleoprotein complex biogenesis rRNA processing cellular component biogenesis ribosome biogenesis cellular component organization or biogenesis rRNA metabolic process ncRNA metabolic process tRNA metabolic process tRNA processing cellular component organization organelle organization cellular component assembly organelle assembly P-body assembly non-membrane-bounded organelle assembly	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle protein-containing complex nuclear protein-containing complex spliceosomal complex ribonucleoprotein complex precatalytic spliceosome spliceosomal snRNP complex U6 snRNP Sm-like protein family complex small nuclear ribonucleoprotein complex catalytic step 2 spliceosome catalytic complex sno(s)RNA-containing ribonucleoprotein complex U4/U6 snRNP cytoplasmic ribonucleoprotein granule ribonucleoprotein granule cytoplasm supramolecular complex P-body Lsm1-7-Pat1 complex U4/U6 x U5 tri-snRNP complex spliceosomal tri-snRNP complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR040002	U6 snRNA-associated Sm-like protein Lsm3	Family
A, B	IPR001163	Sm domain, eukaryotic/archaea-type	Domain
A, B	IPR047575	Sm domain	Domain
A, B	IPR010920	LSM domain superfamily	Homologous Superfamily
A, B	IPR034105	Sm-like protein Lsm3	Domain

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.