Q6L153 (RISB_PICTO) 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:	PTO0714

Organism

Picrophilus torridus (strain ATCC 700027 / DSM 9790 / JCM 10055 / NBRC 100828) [Complete proteome] [HAMAP]

Taxonomic identifier

263820 [NCBI]

Taxonomic lineage

Archaea › Euryarchaeota › Thermoplasmata › Thermoplasmatales › Picrophilaceae › Picrophilus

Protein attributes

Sequence length	136 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 – 136	136	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_0000134848

Sequences

	Sequence		Length	Mass (Da)
	Q6L153 [UniParc]. Last modified July 5, 2004. Version 1. Checksum: ECBF43E942E5CC26	FASTA	136	15,150
	10 20 30 40 50 60 MIRIGMVVAE FNYDITMMML ERARSYAEFL GVEVHKILRV PGSFDMPLAI KKLLMDNDID 70 80 90 100 110 120 GVVTIGAVIK GETDHHKIIM DNVSRKITDL SLEYNKPVAL GISGPGESRL QAEARIDMAK 130 EAVESCVKMI KLLKSN

References

[1]

"Genome sequence of Picrophilus torridus and its implications for life around pH 0." Fuetterer O., Angelov A., Liesegang H., Gottschalk G., Schleper C., Schepers B., Dock C., Antranikian G., Liebl W. Proc. Natl. Acad. Sci. U.S.A. 101:9091-9096(2004) [PubMed: 15184674] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 700027 / DSM 9790 / JCM 10055 / NBRC 100828.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE017261 Genomic DNA. Translation: AAT43299.1.
RefSeq	YP_023492.1. NC_005877.1.
3D structure databases
ProteinModelPortal	Q6L153.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	2845293.
GenomeReviews	Gene locus PTO0714 in contig AE017261_GR.
KEGG	pto:PTO0714.
NMPDR	fig|263820.1.peg.714.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG311126.
OMA	IQGATKH.
PhylomeDB	Q6L153.
ProtClustDB	PRK00061.
Enzyme and pathway databases
BioCyc	PTOR263820:PTO0714-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_PICTO

Accession

Primary (citable) accession number: Q6L153

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 30, 2005
Last sequence update:	July 5, 2004
Last modified:	December 14, 2011
This is version 49 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program