Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyYrdC/RibB-like 8089685 3000166 SCOP2B (2022-06-29)
ASCOP2 FamilyRibB-like 8089684 4000387 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyYrdC/RibB-like 8089685 3000166 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BDHBP_synthasee1snnB1 A: a+b complex topologyX: YrdC/RibB (From Topology)H: YrdC/RibB (From Topology)T: YrdC/RibBF: DHBP_synthaseECOD (1.6)
ADHBP_synthasee1snnA1 A: a+b complex topologyX: YrdC/RibB (From Topology)H: YrdC/RibB (From Topology)T: YrdC/RibBF: DHBP_synthaseECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B3.90.870.10 Alpha Beta Alpha-Beta Complex DHBP synthase DHBP synthaseCATH (4.3.0)
A3.90.870.10 Alpha Beta Alpha-Beta Complex DHBP synthase DHBP synthaseCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF009263,4-dihydroxy-2-butanone 4-phosphate synthase (DHBP_synthase)3,4-dihydroxy-2-butanone 4-phosphate synthase- Family

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

ChainsEnzyme NameDescriptionCatalytic Residues
A, B
3,4-dihydroxy-2-butanone-4-phosphate synthase  M-CSA #648

L-3,4-Dihydroxy-2-butanone-4-phosphate synthase catalyses the conversion of ribulose 5-phosphate to L-3,4-dihydroxy-2-butanone-4-phosphate (DHBP) and formate in riboflavin biosynthesis. The proposed mechanism shares features with many enzymes, including the sugar isomerases.

Defined by 6 residues: ASP:A-30CYS:A-55TYR:A-95GLU:A-185ASN:B-106SER:B-147
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Explore in 3DM-CSA Motif Definition
EC: 5.4.99 (PDB Primary Data)