Q975M5 (RISB_SULTO) 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:	STK_03940

Organism

Sulfolobus tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7) [Complete proteome] [HAMAP]

Taxonomic identifier

273063 [NCBI]

Taxonomic lineage

Archaea › Crenarchaeota › Thermoprotei › Sulfolobales › Sulfolobaceae › Sulfolobus

Protein attributes

Sequence length	155 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: HAMAP
Cellular component	riboflavin synthase complex Inferred from electronic annotation. Source: InterPro
Molecular function	riboflavin synthase activity 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 – 155	155	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_0000134854

Sequences

	Sequence		Length	Mass (Da)
	Q975M5 [UniParc]. Last modified December 14, 2011. Version 2. Checksum: 9B005BE2D94973C7	FASTA	155	17,242
	10 20 30 40 50 60 MPDQSINLAI VVAEFNYDIT YLMLQRAIAH AKFLGANVKV VFKVPGSYDM AIAVKELLKR 70 80 90 100 110 120 DDIDAVVTLG AVIKGETKHD EIVATQTARK ILDLSVEYGK PVTLGIIGHG VTHEQAVERI 130 140 150 EEYSTRAVEA AIKLAKRLRE LRKIQTLNEE MVVIE

References

[1]

"Complete genome sequence of an aerobic thermoacidophilic Crenarchaeon, Sulfolobus tokodaii strain7." Kawarabayasi Y., Hino Y., Horikawa H., Jin-no K., Takahashi M., Sekine M., Baba S., Ankai A., Kosugi H., Hosoyama A., Fukui S., Nagai Y., Nishijima K., Otsuka R., Nakazawa H., Takamiya M., Kato Y., Yoshizawa T. , Tanaka T., Kudoh Y., Yamazaki J., Kushida N., Oguchi A., Aoki K., Masuda S., Yanagii M., Nishimura M., Yamagishi A., Oshima T., Kikuchi H. DNA Res. 8:123-140(2001) [PubMed: 11572479] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: DSM 16993 / JCM 10545 / NBRC 100140 / 7.

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Additional computationally mapped references.

Cross-references

Sequence databases
EMBL GenBank DDBJ	BA000023 Genomic DNA. Translation: BAK54262.1.
3D structure databases
ProteinModelPortal	Q975M5.
ModBase	Search...
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GenomeReviews	Gene locus ST0394 in contig BA000023_GR.
KEGG	sto:ST0394.
NMPDR	fig|273063.1.peg.434.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	HBG311126.
OMA	IQGATKH.
PhylomeDB	Q975M5.
ProtClustDB	PRK00061.
Enzyme and pathway databases
BioCyc	STOK273063:ST0394-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_SULTO

Accession

Primary (citable) accession number: Q975M5
Secondary accession number(s): F9VMW5

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 29, 2003
Last sequence update:	December 14, 2011
Last modified:	January 25, 2012
This is version 53 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program