Annotations: 4YEY

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth C]	SCOP2B Superfamily	IHF-like DNA-binding proteins	8036540	3000426	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	IHF-like DNA-binding proteins	8036540	3000426	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)
D [auth C]	Trypsin	e4yeyC1	A: a/b three-layered sandwiches	X: Spectrin repeat-like	H: EF-hand-related	T: EF-hand	F: Trypsin	ECOD (v294.1)
A	Trypsin	e4yeyA1	A: a/b three-layered sandwiches	X: Spectrin repeat-like	H: EF-hand-related	T: EF-hand	F: Trypsin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth C]	4.10.520.10	Few Secondary Structures	Irregular	HU Protein	Chain A	CATH (4.3.0)
A	4.10.520.10	Few Secondary Structures	Irregular	HU Protein	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D [auth C]	PF00216	Bacterial DNA-binding protein (Bac_DNA_binding)	Bacterial DNA-binding protein		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth D]	synthetic DNA strand	-	-	-
B	synthetic DNA strand	-	-	-
A, D [auth C]	DNA-binding protein HU-alpha	DNA binding binding nucleic acid binding structural molecule activity structural constituent of chromatin identical protein binding protein binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA replication initiation metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA replication initiation metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process nucleic acid metabolic process DNA repair cellular component organization organelle organization chromosome condensation chromosome organization cellular component organization or biogenesis bacterial nucleoid DNA packaging RNA metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process RNA biosynthetic process DNA-templated transcription nucleic acid biosynthetic process biosynthetic process	cellular anatomical structure membrane primosome complex protein-containing complex intracellular anatomical structure protein-DNA complex intracellular membraneless organelle chromosome intracellular organelle DnaA-HU complex organelle membraneless organelle replication fork replisome cellular anatomical structure membrane primosome complex protein-containing complex intracellular anatomical structure protein-DNA complex intracellular membraneless organelle chromosome intracellular organelle DnaA-HU complex organelle membraneless organelle replication fork replisome cytoplasm cytosol bacterial nucleoid nucleoid HU-DNA complex DNA bending complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth C]	IPR010992	Integration host factor (IHF)-like DNA-binding domain superfamily	Homologous Superfamily
A, D [auth C]	IPR020816	Histone-like DNA-binding protein, conserved site	Conserved Site
A, D [auth C]	IPR000119	Histone-like DNA-binding protein	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.