Q8ZTE3 (RISB_PYRAE) 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:	PAE3296

Organism

Pyrobaculum aerophilum (strain ATCC 51768 / IM2 / DSM 7523 / JCM 9630 / NBRC 100827)

Taxonomic identifier

178306 [NCBI]

Taxonomic lineage

Archaea › Crenarchaeota › Thermoprotei › Thermoproteales › Thermoproteaceae › Pyrobaculum

Protein attributes

Sequence length	150 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 Reference 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 – 150	150	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_0000134849

Sequences

	Sequence		Length	Mass (Da)
	Q8ZTE3 [UniParc]. Last modified March 1, 2002. Version 1. Checksum: 73751C1363A8AD8D	FASTA	150	16,474
	10 20 30 40 50 60 MVRLAIVVAE FNYDITQLML QKAVEHAKFL GAEITYIVKT PGVYDIPMIL KELVAKEEVD 70 80 90 100 110 120 AVATLGAVIQ GATKHDELVA TQAARKILDI AVESGKPITL GIIGHGANRI QALERVEEYA 130 140 150 RRAVEAAVKM ARRKKALREA KYNGSTVYID

References

[1]	"Genome sequence of the hyperthermophilic crenarchaeon Pyrobaculum aerophilum." Fitz-Gibbon S.T., Ladner H., Kim U.-J., Stetter K.O., Simon M.I., Miller J.H. Proc. Natl. Acad. Sci. U.S.A. 99:984-989(2002) [PubMed: 11792869] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: ATCC 51768 / IM2 / DSM 7523 / JCM 9630 / NBRC 100827.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	AE009441 Genomic DNA. Translation: AAL64819.1.
RefSeq	NP_560637.1. NC_003364.1.
3D structure databases
ProteinModelPortal	Q8ZTE3.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	1464008.
GenomeReviews	Gene locus PAE3296 in contig AE009441_GR.
KEGG	pai:PAE3296.
NMPDR	fig|178306.1.peg.2327.
Phylogenomic databases
HOGENOM	HBG311126.
OMA	IQGATKH.
ProtClustDB	PRK00061.
Enzyme and pathway databases
BioCyc	PAER178306:PAE3296-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_PYRAE

Accession

Primary (citable) accession number: Q8ZTE3

Entry history

Integrated into UniProtKB/Swiss-Prot:	June 20, 2003
Last sequence update:	March 1, 2002
Last modified:	November 16, 2011
This is version 48 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program