Reviewed, UniProtKB/Swiss-Prot Q0S0K2 (RIBBA_RHOSR)

Names and origin

Protein names

Recommended name:
    Riboflavin biosynthesis protein ribBA
Including the following 2 domains:
    1- Recommended name:
            3,4-dihydroxy-2-butanone 4-phosphate synthase
                Short name=DHBP synthase
              EC=4.1.99.12
    2- Recommended name:
            GTP cyclohydrolase-2
              EC=3.5.4.25
        Alternative name(s):
            GTP cyclohydrolase II

Gene names

Name:	ribBA
Ordered Locus Names:	RHA1_ro07170

Organism

Rhodococcus sp. (strain RHA1) [Complete proteome] [HAMAP]

Taxonomic identifier

101510 [NCBI]

Taxonomic lineage

Bacteria › Actinobacteria › Actinobacteridae › Actinomycetales › Corynebacterineae › Nocardiaceae › Rhodococcus

Protein attributes

Sequence length	417 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
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. Catalyzes the conversion of GTP to 2,5-diamino-6-ribosylamino-4(3H)-pyrimidinone 5'-phosphate (DARP), formate and pyrophosphate By similarity.
Catalytic activity	D-ribulose 5-phosphate = formate + L-3,4-dihydroxybutan-2-one 4-phosphate. HAMAP MF_01283 GTP + 3 H2O = formate + 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine + diphosphate. HAMAP MF_01283
Cofactor	Binds 2 divalent metal cations per subunit. Magnesium or manganese By similarity. Binds 1 zinc ion per subunit By similarity.
Pathway	Cofactor biosynthesis; riboflavin biosynthesis; 3,4-dihydroxy-2-butanone 4-phosphate from D-ribulose 5-phosphate: step 1/1. HAMAP MF_01283 Cofactor biosynthesis; riboflavin biosynthesis; 6,7-dimethyl-8-(1-D-ribityl)lumazine from GTP: step 1/4. HAMAP MF_01283
Sequence similarities	In the N-terminal section; belongs to the DHBP synthase family. In the C-terminal section; belongs to the GTP cyclohydrolase II family.

Ontologies

Keywords
Biological process	Riboflavin biosynthesis
Ligand	GTP-binding Magnesium Manganese Metal-binding Nucleotide-binding Zinc
Molecular function	Hydrolase Lyase
Technical term	Complete proteome Multifunctional enzyme
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 GTP binding Inferred from electronic annotation. Source: UniProtKB-KW GTP cyclohydrolase II 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 zinc 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 – 417	417	Riboflavin biosynthesis protein ribBA HAMAP MF_01283		PRO_1000067430
Regions
	Nucleotide binding	259 – 263	5	GTP By similarity
	Nucleotide binding	303 – 305	3	GTP By similarity
	Region	1 – 204	204	DHBP synthase HAMAP MF_01283
	Region	28 – 29	2	D-ribulose 5-phosphate binding By similarity
	Region	141 – 145	5	D-ribulose 5-phosphate binding By similarity
	Region	205 – 417	213	GTP cyclohydrolase II HAMAP MF_01283
Sites
	Active site	337	1	Proton acceptor; for GTP cyclohydrolase activity Potential
	Active site	339	1	Nucleophile; for GTP cyclohydrolase activity By similarity
	Metal binding	29	1	Magnesium or manganese 1 By similarity
	Metal binding	29	1	Magnesium or manganese 2 By similarity
	Metal binding	144	1	Magnesium or manganese 2 By similarity
	Metal binding	264	1	Zinc; catalytic By similarity
	Metal binding	275	1	Zinc; catalytic By similarity
	Metal binding	277	1	Zinc; catalytic By similarity
	Binding site	33	1	D-ribulose 5-phosphate By similarity
	Binding site	165	1	D-ribulose 5-phosphate By similarity
	Binding site	280	1	GTP By similarity
	Binding site	325	1	GTP By similarity
	Binding site	360	1	GTP By similarity
	Binding site	365	1	GTP By similarity
	Site	127	1	Essential for DHBP synthase activity By similarity
	Site	165	1	Essential for DHBP synthase activity By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q0S0K2-1 [UniParc]. Last modified September 5, 2006. Version 1. Checksum: EF407276ABF26FBA	FASTA	417	45,169
	10 20 30 40 50 60 MTRFDSIERA VADIAAGKAV VVVDDEDREN EGDLIFAAEK ATPELVAFMV RYTSGYLCVP 70 80 90 100 110 120 LDGADCDRLG LPPMYATNQD KHGTAYTVTV DAREGIGTGI SASDRAATMR LLADPSSGAQ 130 140 150 160 170 180 DFTRPGHVVP LRAKEGGVLR RPGHTEAAVD LARMADLRPA GVICEIVSQK DEGHMAQTDE 190 200 210 220 230 240 LRVFADDHNL ALISIADLIA WRRKHEKHVE RVASARIPTR HGEFTAVGYR SIYDDVEHVA 250 260 270 280 290 300 LVRGDLPGPD GDGSDVLVRV HSECLTGDVF GSLRCDCGPQ LDAALDMVAQ EGRGVVLYMR 310 320 330 340 350 360 GHEGRGIGLM HKLQAYQLQD AGSDTVDANL ELGLPADARD YGIGAQILVD LGISSMRLLT 370 380 390 400 410 NNPAKRVGLD GYGLQITERV SMPLRANAEN LTYLRTKRDR MGHDLIGLDD FEAGEML

References

[1]

"The complete genome of Rhodococcus sp. RHA1 provides insights into a catabolic powerhouse." McLeod M.P., Warren R.L., Hsiao W.W.L., Araki N., Myhre M., Fernandes C., Miyazawa D., Wong W., Lillquist A.L., Wang D., Dosanjh M., Hara H., Petrescu A., Morin R.D., Yang G., Stott J.M., Schein J.E., Shin H. , Smailus D., Siddiqui A.S., Marra M.A., Jones S.J.M., Holt R., Brinkman F.S.L., Miyauchi K., Fukuda M., Davies J.E., Mohn W.W., Eltis L.D. Proc. Natl. Acad. Sci. U.S.A. 103:15582-15587(2006) [PubMed: 17030794] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000431 Genomic DNA. Translation: ABG98934.1.
RefSeq	YP_707092.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	4224720.
GenomeReviews	Gene locus RHA1_ro07170 in contig CP000431_GR.
KEGG	rha:RHA1_ro07170.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q0S0K2.
OMA	Q0S0K2. LRCDCRM.
Enzyme and pathway databases
BioCyc	RSP101510:RHA1_RO07170-MON.
Family and domain databases
HAMAP	MF_01283. [Tree]
InterPro	IPR017945. DHBP_synth_RibB-like_a/b_dom. IPR000422. DHBP_synthase_RibB. IPR000926. GTP_CycHdrlase_II. IPR016299. Riboflavin_synth_RibA. [Graphical view]
Gene3D	G3DSA:3.90.870.10. DHBP_synth_RibB-like_a/b_dom. 1 hit.
Pfam	PF00926. DHBP_synthase. 1 hit. PF00925. GTP_cyclohydro2. 1 hit. [Graphical view]
PIRSF	PIRSF001259. RibA. 1 hit.
ProDom	PD003034. DHBP_synthase. 1 hit. [Graphical view] [Entries sharing at least one domain]
TIGRFAMs	TIGR00505. ribA. 1 hit. TIGR00506. ribB. 1 hit.
ProtoNet	Search...

Entry information

Entry name

RIBBA_RHOSR

Accession

Primary (citable) accession number: Q0S0K2

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 5, 2008
Last sequence update:	September 5, 2006
Last modified:	June 16, 2009
This is version 27 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)