4KHA

Structural basis of histone H2A-H2B recognition by the essential chaperone FACT

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)
B	d4khab1	All alpha proteins	Histone-fold	Histone-fold	Nucleosome core histones	automated matches	clawed frog,common platanna,platanna (Xenopus laevis ) [TaxId: 8355 ],	SCOPe (2.08)
B	d4khab2	Artifacts	Tags	Tags	Tags	N-terminal Tags	clawed frog,common platanna,platanna (Xenopus laevis ) [TaxId: 8355 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Core histone-like	8041279	3001387	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Core histone-like	8067126	3001387	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	Rtt106	e4khaA2	A: beta barrels	X: PH domain-like	H: PH domain-like (From Topology)	T: PH domain-like	F: Rtt106	ECOD (1.6)
A	SPT16	e4khaA1	A: beta barrels	X: PH domain-like	H: PH domain-like (From Topology)	T: PH domain-like	F: SPT16	ECOD (1.6)
A	Histone	e4khaA3	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: Histone	ECOD (1.6)
B	Histone_1	e4khaB1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: Histone_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.29.150	Mainly Beta	Roll	PH-domain like		CATH (4.3.0)
A	2.30.29.30	Mainly Beta	Roll	PH-domain like	Pleckstrin-homology domain (PH domain)/Phosphotyrosine-binding domain (PTB)	CATH (4.3.0)
A	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)
B	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF08644	FACT complex subunit (SPT16/CDC68) (SPT16)	FACT complex subunit (SPT16/CDC68)	Proteins in this family are subunits the FACT complex. The FACT complex plays a role in transcription initiation and promotes binding of TATA-binding protein (TBP) to a TATA box in chromatin [2].	Domain
A	PF08512	Histone chaperone Rttp106-like, middle domain (Rttp106-like_middle)	Histone chaperone Rttp106-like, middle domain	This Pleckstrin homology (PH) domain is found in the middle region of Rttp106, a histone chaperone involved in heterochromatin-mediated silencing [1]. It is also found in the final part of the middle domain of various FACT (facilitates chromatin tran ...	This Pleckstrin homology (PH) domain is found in the middle region of Rttp106, a histone chaperone involved in heterochromatin-mediated silencing [1]. It is also found in the final part of the middle domain of various FACT (facilitates chromatin transactions) complex subunits, such as Spt16 and either Pob3 (yeast) or the related SSRP1 (higher eukaryotes). This domain plays a role in DNA binding [2-4].	Domain
A	PF00125	Core histone H2A/H2B/H3/H4 (Histone)	Core histone H2A/H2B/H3/H4		Domain
B	PF16211	C-terminus of histone H2A (Histone_H2A_C)	C-terminus of histone H2A	-	Family
B	PF00125	Core histone H2A/H2B/H3/H4 (Histone)	Core histone H2A/H2B/H3/H4		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Spt16M-Histone H2B 1.1 chimera	DNA binding binding nucleic acid binding protein heterodimerization activity protein binding protein dimerization activity structural molecule activity structural constituent of chromatin cation binding ion binding metal ion binding small molecule binding protein-containing complex binding chromatin binding DNA binding binding nucleic acid binding protein heterodimerization activity protein binding protein dimerization activity structural molecule activity structural constituent of chromatin cation binding ion binding metal ion binding small molecule binding protein-containing complex binding chromatin binding nucleosome binding	nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress DNA repair nucleobase-containing compound metabolic process DNA replication metabolic process cellular process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress DNA repair transcription elongation by RNA polymerase II RNA metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process DNA-templated transcription elongation transcription by RNA polymerase II biosynthetic process	protein-containing complex intracellular anatomical structure protein-DNA complex nucleosome intracellular membraneless organelle chromatin chromosome intracellular organelle cellular anatomical structure organelle membraneless organelle membrane-bounded organelle nucleus intracellular membrane-bounded organelle protein-containing complex intracellular anatomical structure protein-DNA complex nucleosome intracellular membraneless organelle chromatin chromosome intracellular organelle cellular anatomical structure organelle membraneless organelle membrane-bounded organelle nucleus intracellular membrane-bounded organelle transcription elongation factor complex membrane-enclosed lumen nuclear protein-containing complex intracellular organelle lumen FACT complex nucleoplasm organelle lumen nuclear lumen
B	Histone H2A	DNA binding binding nucleic acid binding protein heterodimerization activity protein binding protein dimerization activity structural molecule activity structural constituent of chromatin	-	protein-containing complex intracellular anatomical structure protein-DNA complex nucleosome intracellular membraneless organelle chromatin chromosome intracellular organelle cellular anatomical structure organelle membraneless organelle membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR009072	Histone-fold	Homologous Superfamily
A	IPR007125	Histone H2A/H2B/H3	Domain
A	IPR055333	Histone H2B, conserved site	Conserved Site
A	IPR000558	Histone H2B	Family
A	IPR033825	FACT complex subunit Spt16, peptidase M24-like domain	Domain
A	IPR048969	FACT complex subunit SPT16, C-terminal domain	Domain
A	IPR029149	Creatinase/Aminopeptidase P/Spt16, N-terminal	Homologous Superfamily
A	IPR011993	PH-like domain superfamily	Homologous Superfamily
A	IPR013719	Histone chaperone RTT106/FACT complex subunit SPT16-like, middle domain	Domain
A	IPR040258	FACT complex subunit Spt16	Family
A	IPR013953	FACT complex subunit SPT16, middle domain	Domain
A	IPR029148	FACT complex subunit SPT16, N-terminal lobe domain	Domain
A	IPR036005	Creatinase/aminopeptidase-like	Homologous Superfamily
A	IPR000994	Peptidase M24	Domain
B	IPR009072	Histone-fold	Homologous Superfamily
B	IPR007125	Histone H2A/H2B/H3	Domain
B	IPR002119	Histone H2A	Family
B	IPR032454	Histone H2A, C-terminal domain	Domain
B	IPR032458	Histone H2A conserved site	Conserved Site

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.