Reviewed, UniProtKB/Swiss-Prot Q8KA55 (RIBB_BUCAP)

Names and origin

Protein names

Recommended name:
    3,4-dihydroxy-2-butanone 4-phosphate synthase
      Short name=DHBP synthase
    EC=4.1.99.12

Gene names

Name:	ribB
Ordered Locus Names:	BUsg_056

Organism

Buchnera aphidicola subsp. Schizaphis graminum [Complete proteome] [HAMAP]

Taxonomic identifier

98794 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Buchnera

Protein attributes

Sequence length	213 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the conversion of D-ribulose 5-phosphate to formate and 3,4-dihydroxy-2-butanone 4-phosphate By similarity. HAMAP MF_00180
Catalytic activity	D-ribulose 5-phosphate = formate + L-3,4-dihydroxybutan-2-one 4-phosphate. HAMAP MF_00180
Cofactor	Binds 2 divalent metal cations per subunit. Magnesium or manganese By similarity. HAMAP MF_00180
Pathway	Cofactor biosynthesis; riboflavin biosynthesis; 2-hydroxy-3-oxobutyl phosphate from D-ribulose 5-phosphate: step 1/1. HAMAP MF_00180
Subunit structure	Homodimer By similarity. HAMAP MF_00180
Sequence similarities	Belongs to the DHBP synthase family.

Ontologies

Keywords
Biological process	Riboflavin biosynthesis
Ligand	Magnesium Manganese Metal-binding
Molecular function	Lyase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	riboflavin biosynthetic process Inferred from electronic annotation. Source: HAMAP
Molecular function	3,4-dihydroxy-2-butanone-4-phosphate synthase activity Inferred from electronic annotation. Source: HAMAP magnesium ion binding Inferred from electronic annotation. Source: HAMAP manganese ion binding Inferred from electronic annotation. Source: HAMAP
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 213	213	3,4-dihydroxy-2-butanone 4-phosphate synthase HAMAP MF_00180		PRO_0000151792
Regions
	Region	37 – 38	2	Substrate binding By similarity
	Region	150 – 154	5	Substrate binding By similarity
Sites
	Metal binding	38	1	Magnesium or manganese 1 By similarity
	Metal binding	38	1	Magnesium or manganese 2 By similarity
	Metal binding	153	1	Magnesium or manganese 2 By similarity
	Binding site	42	1	Substrate By similarity
	Binding site	174	1	Substrate By similarity
	Site	136	1	Essential for catalytic activity By similarity
	Site	174	1	Essential for catalytic activity By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q8KA55-1 [UniParc]. Last modified October 1, 2002. Version 1. Checksum: 0A867A837CAA7A0D	FASTA	213	23,278
	10 20 30 40 50 60 MNQTLLSEFG NPIERVKKAI SALQLGEGII ILDDEKRENE GDLVFSSETM TVEQMALTIR 70 80 90 100 110 120 YGSGIVCLCI TESKRKKLNL PMMVKHNTST YRTGFTVTIE ASKGVSTGVS AKDRLTTIKT 130 140 150 160 170 180 ATADDAQPSD LNRPGHVFPL RANGGGILAR AGHTEAAIEI VSLAGFKPYG VICELTNKDG 190 200 210 SMSRTPEIIK FSKSKKMKIL TIKDLILYVQ NKK

References

[1]

"50 million years of genomic stasis in endosymbiotic bacteria." Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S., Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E. Science 296:2376-2379(2002) [PubMed: 12089438] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE013218 Genomic DNA. Translation: AAM67627.1.
RefSeq	NP_660416.1.
3D structure databases
SMR	Q8KA55. Positions 1-210.
ModBase	Search...
Genome annotation databases
GeneID	1005872.
GenomeReviews	Gene locus BUsg_056 in contig AE013218_GR.
KEGG	bas:BUsg056.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG735778.
OMA	RGHTEAT.
Enzyme and pathway databases
BioCyc	BAPH198804:BUSG056-MONOMER.
Family and domain databases
HAMAP	MF_00180. RibB. [Tree]
InterPro	IPR017945. DHBP_synth_RibB-like_a/b_dom. IPR000422. DHBP_synthase_RibB. [Graphical view]
Gene3D	G3DSA:3.90.870.10. DHBP_synth_RibB-like_a/b_dom. 1 hit.
Pfam	PF00926. DHBP_synthase. 1 hit. [Graphical view]
TIGRFAMs	TIGR00506. ribB. 1 hit.
ProtoNet	Search...

Entry information

Entry name

RIBB_BUCAP

Accession

Primary (citable) accession number: Q8KA55

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 8, 2002
Last sequence update:	October 1, 2002
Last modified:	February 9, 2010
This is version 43 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)