Q11NR0 (RISB_CYTH3) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
6,7-dimethyl-8-ribityllumazine synthase
Short name=DMRL synthase
Short name=Lumazine synthase
EC=2.5.1.9

Alternative name(s):
Riboflavin synthase beta chain

Gene names

Name:	ribH
Ordered Locus Names:	CHU_3720

Organism

Cytophaga hutchinsonii (strain ATCC 33406 / NCIMB 9469) [Complete proteome] [HAMAP]

Taxonomic identifier

269798 [NCBI]

Taxonomic lineage

Bacteria › Bacteroidetes › Cytophagia › Cytophagales › Cytophagaceae › Cytophaga

Protein attributes

Sequence length	159 AA.
Sequence status	Complete.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Riboflavin synthase is a bifunctional enzyme complex catalyzing the formation of riboflavin from 5-amino-6-(1'-D)-ribityl-amino-2,4(1H,3H)-pyrimidinedione and L-3,4-dihydrohy-2-butanone-4-phosphate via 6,7-dimethyl-8-lumazine. The beta subunit catalyzes the condensation of 5-amino-6-(1'-D)-ribityl-amino-2,4(1H,3H)-pyrimidinedione with L-3,4-dihydrohy-2-butanone-4-phosphate yielding 6,7-dimethyl-8-lumazine By similarity. HAMAP MF_00178
Catalytic activity	2 6,7-dimethyl-8-(1-D-ribityl)lumazine = riboflavin + 4-(1-D-ribitylamino)-5-amino-2,6-dihydroxypyrimidine. HAMAP MF_00178
Pathway	Cofactor biosynthesis; riboflavin biosynthesis; riboflavin from 2-hydroxy-3-oxobutyl phosphate and 5-amino-6-(D-ribitylamino)uracil: step 2/2. HAMAP MF_00178
Sequence similarities	Belongs to the DMRL synthase family.

Ontologies

Keywords
Biological process	Riboflavin biosynthesis
Molecular function	Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	riboflavin biosynthetic process Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	riboflavin synthase complex Inferred from electronic annotation. Source: InterPro
Molecular function	riboflavin synthase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 159	159	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_1000040412

Sequences

	Sequence		Length	Mass (Da)
	Q11NR0 [UniParc]. Last modified August 22, 2006. Version 1. Checksum: 117149720EF7FEA2	FASTA	159	17,164
	10 20 30 40 50 60 MSSADKNLSS YSGEIPNLSS RVFGIVVAEW NEEITEPLYE GAVEVLLKHG IPKANIIRTN 70 80 90 100 110 120 VPGTFELSLG AQWLAMKKGV DAVICLGCVI QGETRHFDFI CNAVSIGITE VNLKFNKPVI 130 140 150 FGVLTTDNKE QAFDRAGGKH GNKGDEAAIT ALKMLAQTI

References

[1]

"Genome sequence of the cellulolytic gliding bacterium Cytophaga hutchinsonii." Xie G., Bruce D.C., Challacombe J.F., Chertkov O., Detter J.C., Gilna P., Han C.S., Lucas S., Misra M., Myers G.L., Richardson P., Tapia R., Thayer N., Thompson L.S., Brettin T.S., Henrissat B., Wilson D.B., McBride M.J. Appl. Environ. Microbiol. 73:3536-3546(2007) [PubMed: 17400776] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 33406 / NCIMB 9469.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000383 Genomic DNA. Translation: ABG60953.1.
RefSeq	YP_680296.1. NC_008255.1.
3D structure databases
ProteinModelPortal	Q11NR0.
ModBase	Search...
Protein-protein interaction databases
STRING	Q11NR0.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	4184498.
GenomeReviews	Gene locus CHU_3720 in contig CP000383_GR.
KEGG	chu:CHU_3720.
NMPDR	fig|269798.12.peg.3546.
PATRIC	21598321. VBICytHut34013_3705.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0054.
HOGENOM	HBG311126.
OMA	AGECSSG.
ProtClustDB	PRK00061.
Enzyme and pathway databases
BioCyc	CHUT269798:CHU_3720-MONOMER.
Family and domain databases
HAMAP	MF_00178. Lumazine_synth. [Tree]
InterPro	IPR002180. DMRL_synthase. [Graphical view]
Gene3D	G3DSA:3.40.50.960. DMRL_synthase. 1 hit.
KO	K00794.
PANTHER	PTHR21058. DMRL_synthase. 1 hit.
Pfam	PF00885. DMRL_synthase. 1 hit. [Graphical view]
SUPFAM	SSF52121. DMRL_synthase. 1 hit.
TIGRFAMs	TIGR00114. Lumazine-synth. 1 hit.
ProtoNet	Search...

Entry information

Entry name

RISB_CYTH3

Accession

Primary (citable) accession number: Q11NR0

Entry history

Integrated into UniProtKB/Swiss-Prot:	January 15, 2008
Last sequence update:	August 22, 2006
Last modified:	January 25, 2012
This is version 39 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program