A4YCS3 (RISB_METS5) 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:	Msed_0048

Organism

Metallosphaera sedula (strain ATCC 51363 / DSM 5348) [Complete proteome] [HAMAP]

Taxonomic identifier

399549 [NCBI]

Taxonomic lineage

Archaea › Crenarchaeota › Thermoprotei › Sulfolobales › Sulfolobaceae › Metallosphaera

Protein attributes

Sequence length	151 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 – 151	151	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_1000071645

Sequences

	Sequence		Length	Mass (Da)
	A4YCS3 [UniParc]. Last modified May 29, 2007. Version 1. Checksum: FEF4374C4F78A9A1	FASTA	151	16,644
	10 20 30 40 50 60 MQDSSIKLGI VVAEFNYDIT HLMLDRAISH AKFLNAEVRA VFKVPGTFEI PLAVKQLLSR 70 80 90 100 110 120 DDIDCVVTLG AVIKGETKHD EVIANQVARL VSDLSLEFNK PVSLGIIGPG ATHEQAMERI 130 140 150 EEYSTRAVES AVKMARRMRS MMEGSSSVNI E

References

[1]

"The genome sequence of the metal-mobilizing, extremely thermoacidophilic archaeon Metallosphaera sedula provides insights into bioleaching-associated metabolism." Auernik K.S., Maezato Y., Blum P.H., Kelly R.M. Appl. Environ. Microbiol. 74:682-692(2008) [PubMed: 18083856] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 51363 / DSM 5348.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000682 Genomic DNA. Translation: ABP94225.1.
RefSeq	YP_001190149.1. NC_009440.1.
3D structure databases
ProteinModelPortal	A4YCS3.
ModBase	Search...
Protein-protein interaction databases
STRING	A4YCS3.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	5105187.
GenomeReviews	Gene locus Msed_0048 in contig CP000682_GR.
KEGG	mse:Msed_0048.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	arNOG09975.
HOGENOM	HBG311126.
OMA	IQGATKH.
ProtClustDB	PRK00061.
Enzyme and pathway databases
BioCyc	MSED399549:MSED_0048-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_METS5

Accession

Primary (citable) accession number: A4YCS3

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 26, 2008
Last sequence update:	May 29, 2007
Last modified:	November 16, 2011
This is version 29 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program