Annotations: 2BUN

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2buna1	Alpha and beta proteins (a+b)	Ferredoxin-like	Acylphosphatase/BLUF domain-like	BLUF domain	Sensor of blue light AppA	(Cereibacter sphaeroides 2.4.1 ) [TaxId: 272943 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Acylphosphatase/BLUF domain-like	8034900	3000165	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	BLUF	e2bunA1	A: a+b two layers	X: Alpha-beta plaits	H: Acylphosphatase-like (From Topology)	T: Acylphosphatase-like	F: BLUF	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.70.100	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04940	Sensors of blue-light using FAD (BLUF)	Sensors of blue-light using FAD	The BLUF domain has been shown to bind FAD in the AppA protein (Swiss:Q53119). AppA is involved in the repression of photosynthesis genes in response to blue-light.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	APPA	blue light photoreceptor activity molecular transducer activity photoreceptor activity signaling receptor activity FAD binding flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding anion binding nucleotide binding heterocyclic compound binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR007024	BLUF domain	Domain
A	IPR054140	AppA, four helical bundle	Domain
A	IPR054142	AppA, SCHIC domain	Domain
A	IPR036046	Acylphosphatase-like domain superfamily	Homologous Superfamily
A	IPR036594	Methionine synthase domain	Homologous Superfamily

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.