Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyCytochrome b5-like heme/steroid binding domain 8003822 3000073 SCOP2B (2022-06-29)
ASCOP2B SuperfamilyFMN-linked oxidoreductases 8017532 3000014 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyFMN-linked oxidoreductases 8017532 3000014 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ACyt-b5e1fcbA1 A: a+b two layersX: Cystatin-likeH: Cytochrome b5-like heme/steroid binding domain (From Topology)T: Cytochrome b5-like heme/steroid binding domainF: Cyt-b5ECOD (1.6)
AGlu_synthasee1fcbA2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_synthaseECOD (1.6)
BGlu_synthasee1fcbB1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_synthaseECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.10.120.10 Alpha Beta Roll Flavocytochrome B2 Chain A, domain 1CATH (4.3.0)
A3.20.20.70 Alpha Beta Alpha-Beta Barrel TIM Barrel Aldolase class ICATH (4.3.0)
B3.20.20.70 Alpha Beta Alpha-Beta Barrel TIM Barrel Aldolase class ICATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01070FMN-dependent dehydrogenase (FMN_dh)FMN-dependent dehydrogenase- Domain
A, B
PF00173Cytochrome b5-like Heme/Steroid binding domain (Cyt-b5)Cytochrome b5-like Heme/Steroid binding domainThis family includes heme binding domains from a diverse range of proteins. This family also includes proteins that bind to steroids. The family includes progesterone receptors such as Swiss:O00264 [1,2]. Many members of this subfamily are membrane a ...This family includes heme binding domains from a diverse range of proteins. This family also includes proteins that bind to steroids. The family includes progesterone receptors such as Swiss:O00264 [1,2]. Many members of this subfamily are membrane anchored by an N-terminal transmembrane alpha helix. This family also includes a domain in some chitin synthases. There is no known ligand for this domain in the chitin synthases.
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
FLAVOCYTOCHROME B2

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
L-lactate dehydrogenase (cytochrome)  M-CSA #102

The flavo-cytochrome enzyme is a lactate dehydrogenase that catalyses the transfer of a hydride equivalent from its hydroxy acid substrate to the enzyme bound flavin, and thence to proteins of the mitochondrial electron transport chain via a bound cytochrome. The enzyme contains two domains, the flavin domain, capable of converting lactate to pyruvate by itself, and the heme domain which contains the prosthetic group involved in electron transfer from the reduced flavin to an acceptor cytochrome.

Defined by 3 residues: TYR:A-254ASP:A-282HIS:A-373
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