2BYK | pdb_00002byk

Histone fold heterodimer of the Chromatin Accessibility Complex

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)
D	d2bykd_	All alpha proteins	Histone-fold	Histone-fold	TBP-associated factors, TAFs	Chrac-14	FRUIT FLY (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
B	d2bykb1	All alpha proteins	Histone-fold	Histone-fold	TBP-associated factors, TAFs	Chrac-14	FRUIT FLY (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
C	d2bykc_	All alpha proteins	Histone-fold	Histone-fold	TBP-associated factors, TAFs	Chrac-16	FRUIT FLY (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)
A	d2byka1	All alpha proteins	Histone-fold	Histone-fold	TBP-associated factors, TAFs	Chrac-16	FRUIT FLY (Drosophila melanogaster ) [TaxId: 7227 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Core histone-like	8038900	3001387	SCOP2B (2022-06-29)
B	SCOP2 Family	TBP-associated factors, TAFs	8026521	4000797	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Core histone-like	8038900	3001387	SCOP2 (2022-06-29)
C	SCOP2B Superfamily	Core histone-like	8038896	3001387	SCOP2B (2022-06-29)
A	SCOP2 Family	TBP-associated factors, TAFs	8026517	4000797	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Core histone-like	8038896	3001387	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)
D		e2bykD1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: alpha-2-Macroglobulin receptor associated protein (RAP) domain 1	T: alpha-2-Macroglobulin receptor associated protein (RAP) domain 1	F:	ECOD (v294.1)
B	CBFD_NFYB_HMF	e2bykB1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CBFD_NFYB_HMF	ECOD (v294.1)
C		e2bykC1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: alpha-2-Macroglobulin receptor associated protein (RAP) domain 1	T: alpha-2-Macroglobulin receptor associated protein (RAP) domain 1	F:	ECOD (v294.1)
A	CBFD_NFYB_HMF	e2bykA1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CBFD_NFYB_HMF	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	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)
C	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)
A	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
B, D	PF00808	Histone-like transcription factor (CBF/NF-Y) and archaeal histone (CBFD_NFYB_HMF)	Histone-like transcription factor (CBF/NF-Y) and archaeal histone	This family includes archaebacterial histones and histone like transcription factors from eukaryotes.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	CHRAC-14	DNA binding binding chromatin binding nucleic acid binding chromatin DNA binding protein heterodimerization activity protein binding protein dimerization activity	organelle assembly protein-containing complex organization chromosome organization membraneless organelle assembly CENP-A containing chromatin assembly cellular component organization cellular component biogenesis organelle organization cellular component assembly chromatin organization kinetochore assembly protein-containing complex assembly kinetochore organization cellular process organelle assembly protein-containing complex organization chromosome organization membraneless organelle assembly CENP-A containing chromatin assembly cellular component organization cellular component biogenesis organelle organization cellular component assembly chromatin organization kinetochore assembly protein-containing complex assembly kinetochore organization cellular process cellular component organization or biogenesis cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress DNA-templated DNA replication primary metabolic process DNA metabolic process leading strand elongation nucleic acid metabolic process nucleobase-containing compound metabolic process DNA strand elongation DNA replication metabolic process DNA strand elongation involved in DNA replication macromolecule metabolic process cellular response to ionizing radiation cellular response to radiation cellular response to environmental stimulus response to ionizing radiation cellular response to gamma radiation response to radiation response to abiotic stimulus cellular response to abiotic stimulus response to gamma radiation regulation of cellular process negative regulation of biological process negative regulation of cellular process chromatin remodeling negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process heterochromatin formation epigenetic regulation of gene expression negative regulation of metabolic process biological regulation heterochromatin organization regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of gene expression, epigenetic regulation of macromolecule biosynthetic process regulation of metabolic process	membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome chromosome transferase complex intracellular organelle lumen intracellular organelle cellular anatomical structure membraneless organelle catalytic complex membrane-bounded organelle protein-containing complex intracellular anatomical structure nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome chromosome transferase complex intracellular organelle lumen intracellular organelle cellular anatomical structure membraneless organelle catalytic complex intracellular membraneless organelle intracellular membrane-bounded organelle epsilon DNA polymerase complex DNA polymerase complex transferase complex, transferring phosphorus-containing groups organelle lumen organelle intracellular protein-containing complex nuclear lumen ATAC complex chromatin histone acetyltransferase complex acetyltransferase complex protein acetyltransferase complex SAGA-type complex ATPase complex ISWI-type complex SWI/SNF superfamily-type complex CHRAC
A, C	CHRAC-16	protein heterodimerization activity protein binding binding protein dimerization activity molecular adaptor activity nucleic acid binding	cellular component organization chromatin organization chromatin remodeling cellular process cellular component organization or biogenesis nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process	membrane-bounded organelle ATPase complex protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex intracellular membraneless organelle chromatin chromosome intracellular membrane-bounded organelle intracellular organelle ISWI-type complex cellular anatomical structure membrane-bounded organelle ATPase complex protein-containing complex intracellular anatomical structure catalytic complex nucleus nuclear protein-containing complex intracellular membraneless organelle chromatin chromosome intracellular membrane-bounded organelle intracellular organelle ISWI-type complex cellular anatomical structure organelle membraneless organelle SWI/SNF superfamily-type complex CHRAC

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D	IPR009072	Histone-fold	Homologous Superfamily
B, D	IPR003958	Transcription factor CBF/NF-Y/archaeal histone domain	Domain
B, D	IPR051377	DNA Polymerase Epsilon Subunit	Family
A, C	IPR003958	Transcription factor CBF/NF-Y/archaeal histone domain	Domain
A, C	IPR009072	Histone-fold	Homologous Superfamily
A, C	IPR050568	Transcription/DNA replication regulator	Family

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.