Annotations: 1K1G

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth A]	d1k1ga_	Alpha and beta proteins (a+b)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	Eukaryotic type KH-domain (KH-domain type I)	RNA splicing factor 1	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth A]	SCOP2 Family	Eukaryotic type KH-domain (KH-domain type I)	8025333	4001190	SCOP2 (2022-06-29)
B [auth A]	SCOP2 Superfamily	Eukaryotic type KH-domain (KH-domain type I)	8037712	3001023	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	KH_1	e1k1gA2	A: a+b two layers	X: Alpha-lytic protease prodomain-like	H: KH-domains	T: Eukaryotic type KH-domain (KH-domain type I)	F: KH_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	3.30.1370.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S8	Chain: A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A]	PF22675	KHDC4/BBP-like, KH-domain type I (KH-I_KHDC4-BBP)	KHDC4/BBP-like, KH-domain type I	This entry represents eukaryotic type I KH domain. The core KH domain is accompanied by additional alpha-helix and beta-sheet motifs at the C terminus. This entry includes proteins involved in pre-mRNA splicing such as KH domain-containing BBP from f ...	This entry represents eukaryotic type I KH domain. The core KH domain is accompanied by additional alpha-helix and beta-sheet motifs at the C terminus. This entry includes proteins involved in pre-mRNA splicing such as KH domain-containing BBP from fungi, KH homology domain-containing protein 4 (KHDC4, also known as BLOM7) and splicing factor 1 (SF1) from animals, and homologues from plants, including RIK. KHDC4 interacts with the PRP19C/Prp19 complex/NTC/Nineteen complex which is part of the spliceosome. It binds preferentially RNA with A/C rich sequences and poly-C stretches. Branchpoint binding proteins (BBP) from fungi and its mammalian homologue SF1 are required for pre-spliceosome formation [1-5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	5'-R(UPAPUPAPCPUPAPAPCPAP*A)-3'	-	-	-
B [auth A]	SF1-Bo isoform	RNA binding binding nucleic acid binding transcription corepressor activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity mRNA binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding RNA binding binding nucleic acid binding transcription corepressor activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity molecular adaptor activity mRNA binding cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding identical protein binding protein binding	regulation of biosynthetic process regulation of steroid biosynthetic process regulation of biological process regulation of cellular process regulation of lipid metabolic process steroid metabolic process regulation of steroid metabolic process biological regulation lipid biosynthetic process primary metabolic process regulation of primary metabolic process biosynthetic process metabolic process cellular process regulation of biosynthetic process regulation of steroid biosynthetic process regulation of biological process regulation of cellular process regulation of lipid metabolic process steroid metabolic process regulation of steroid metabolic process biological regulation lipid biosynthetic process primary metabolic process regulation of primary metabolic process biosynthetic process metabolic process cellular process regulation of lipid biosynthetic process steroid biosynthetic process regulation of metabolic process lipid metabolic process developmental process multicellular organismal process gonad development reproductive system development cellular developmental process reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics cell differentiation anatomical structure development reproductive structure development Leydig cell differentiation system development sex determination male sex determination 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 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 mRNA splice site recognition mRNA 3'-splice site recognition RNA splicing protein-containing complex organization gene expression nucleobase-containing compound biosynthetic process mRNA metabolic process macromolecule biosynthetic process nucleic acid metabolic process RNA splicing, via transesterification reactions mRNA splicing, via spliceosome RNA splicing, via transesterification reactions with bulged adenosine as nucleophile macromolecule metabolic process regulation of mRNA splicing, via spliceosome regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of mRNA processing regulation of macromolecule metabolic process regulation of RNA splicing regulation of gene expression regulation of macromolecule biosynthetic process regulation of mRNA metabolic process nuclear body organization nucleus organization organelle organization	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen membraneless organelle 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 nucleoplasm organelle lumen organelle nuclear lumen membraneless organelle intracellular membraneless organelle ribosome protein-containing complex nuclear protein-containing complex spliceosomal complex ribonucleoprotein complex U2AF complex nuclear body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A]	IPR032570	Splicing factor 1, helix-hairpin domain	Domain
B [auth A]	IPR004087	K Homology domain	Domain
B [auth A]	IPR001878	Zinc finger, CCHC-type	Domain
B [auth A]	IPR036612	K Homology domain, type 1 superfamily	Homologous Superfamily
B [auth A]	IPR045071	KH domain-containing BBP-like	Family
B [auth A]	IPR047086	Splicing factor 1, helix-hairpin domain superfamily	Homologous Superfamily
B [auth A]	IPR055256	KHDC4/BBP-like, KH-domain type I	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth A]	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

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.