Annotations: 8PXX

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	WW domain	8034988	3001621	SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00397	WW domain (WW)	WW domain	The WW domain is a protein module with two highly conserved tryptophans that binds proline-rich peptide motifs in vitro.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Splicing factor 1	transcription corepressor activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity RNA binding binding nucleic acid binding mRNA binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding transcription corepressor activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity RNA binding binding nucleic acid binding mRNA binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding identical protein binding protein binding	ribonucleoprotein complex biogenesis RNA metabolic process mRNA processing protein-RNA complex assembly cellular component organization cellular component biogenesis nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process spliceosomal complex assembly protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis ribonucleoprotein complex biogenesis RNA metabolic process mRNA processing protein-RNA complex assembly cellular component organization cellular component biogenesis nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process spliceosomal complex assembly protein-RNA complex organization cellular component assembly protein-containing complex assembly cellular component organization or biogenesis RNA processing RNA splicing protein-containing complex organization primary metabolic process gene expression nucleobase-containing compound biosynthetic process mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process biosynthetic process RNA splicing, via transesterification reactions mRNA splicing, via spliceosome cellular process metabolic process RNA splicing, via transesterification reactions with bulged adenosine as nucleophile macromolecule metabolic process regulation of cellular process regulation of mRNA splicing, via spliceosome regulation of primary metabolic process regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of biosynthetic process regulation of mRNA processing regulation of biological process biological regulation regulation of macromolecule metabolic process regulation of RNA splicing regulation of gene expression regulation of macromolecule biosynthetic process regulation of mRNA metabolic process regulation of metabolic process negative regulation of cell population proliferation cell population proliferation regulation of smooth muscle cell proliferation negative regulation of biological process smooth muscle cell proliferation negative regulation of smooth muscle cell proliferation regulation of cell population proliferation negative regulation of cellular process muscle cell proliferation mRNA splice site recognition mRNA 3'-splice site recognition	membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure spliceosomal complex organelle ribonucleoprotein complex U2AF complex membrane-enclosed lumen intracellular organelle lumen membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus nuclear protein-containing complex intracellular membrane-bounded organelle intracellular organelle cellular anatomical structure spliceosomal complex organelle ribonucleoprotein complex U2AF complex membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen membraneless organelle intracellular membraneless organelle ribosome
A	Pre-mRNA-processing factor 40 homolog A	RNA binding binding nucleic acid binding	developmental process regulation of biological process regulation of developmental process biological regulation regulation of cell shape cell morphogenesis regulation of cell morphogenesis anatomical structure morphogenesis anatomical structure development regulation of biological quality regulation of anatomical structure morphogenesis cellular component organization organelle organization cellular process developmental process regulation of biological process regulation of developmental process biological regulation regulation of cell shape cell morphogenesis regulation of cell morphogenesis anatomical structure morphogenesis anatomical structure development regulation of biological quality regulation of anatomical structure morphogenesis cellular component organization organelle organization cellular process cellular component organization or biogenesis cytoskeleton organization regulation of cytokinesis regulation of cellular process regulation of cell cycle process cytokinesis regulation of cell division cell division cell cycle regulation of cell cycle cell cycle process RNA splicing RNA metabolic process primary metabolic process gene expression nucleobase-containing compound biosynthetic process mRNA processing mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process biosynthetic process RNA splicing, via transesterification reactions mRNA cis splicing, via spliceosome mRNA splicing, via spliceosome metabolic process RNA splicing, via transesterification reactions with bulged adenosine as nucleophile macromolecule metabolic process RNA processing cell migration cell motility	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle nuclear lumen nuclear matrix membrane intracellular membraneless organelle membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle nuclear lumen nuclear matrix membrane intracellular membraneless organelle nuclear speck ribonucleoprotein granule nuclear body nucleoplasm membraneless organelle supramolecular complex nuclear ribonucleoprotein granule U2-type spliceosomal complex protein-containing complex prespliceosome nuclear protein-containing complex U2-type prespliceosome spliceosomal complex ribonucleoprotein complex spliceosomal snRNP complex Sm-like protein family complex small nuclear ribonucleoprotein complex U1 snRNP

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR032570	Splicing factor 1, helix-hairpin domain	Domain
B	IPR004087	K Homology domain	Domain
B	IPR047086	Splicing factor 1, helix-hairpin domain superfamily	Homologous Superfamily
B	IPR001878	Zinc finger, CCHC-type	Domain
B	IPR036612	K Homology domain, type 1 superfamily	Homologous Superfamily
B	IPR045071	KH domain-containing BBP-like	Family
B	IPR055256	KHDC4/BBP-like, KH-domain type I	Domain
A	IPR039726	Pre-mRNA-processing factor Prp40	Family
A	IPR036517	FF domain superfamily	Homologous Superfamily
A	IPR002713	FF domain	Domain
A	IPR036020	WW domain superfamily	Homologous Superfamily
A	IPR001202	WW domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	Pharos: Q15637	melanoma ovarian cancer Pick disease psoriasis astrocytic tumor breast cancer cutaneous melanoma head and neck cancer malignant ependymoma medulloblastoma oligodendroglioma pancreatic intraductal papillary-mucinous carcinoma plasma cell myeloma attention deficit hyperactivity disorder, inattentive type breast carcinoma melanoma ovarian cancer Pick disease psoriasis astrocytic tumor breast cancer cutaneous melanoma head and neck cancer malignant ependymoma medulloblastoma oligodendroglioma pancreatic intraductal papillary-mucinous carcinoma plasma cell myeloma attention deficit hyperactivity disorder, inattentive type breast carcinoma glioblastoma interstitial lung disease malignant glioma osteosarcoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia primitive neuroectodermal tumor atypical teratoid rhabdoid tumor chronic obstructive pulmonary disease gout large cell medulloblastoma malignant mesothelioma non-small cell lung carcinoma
A	Pharos: O75400	rheumatoid arthritis amyotrophic lateral sclerosis dermatomyositis juvenile dermatomyositis lymphoplasmacytic lymphoma osteosarcoma pancreatic intraductal papillary-mucinous carcinoma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor esophageal adenocarcinoma large cell medulloblastoma malignant glioma ovarian cancer Pick disease psoriasis rheumatoid arthritis amyotrophic lateral sclerosis dermatomyositis juvenile dermatomyositis lymphoplasmacytic lymphoma osteosarcoma pancreatic intraductal papillary-mucinous carcinoma primitive neuroectodermal tumor atypical teratoid rhabdoid tumor esophageal adenocarcinoma large cell medulloblastoma malignant glioma ovarian cancer Pick disease psoriasis breast cancer glioblastoma lung cancer medulloblastoma pancreatic ductal adenocarcinoma plasma cell myeloma

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.