C3NGF3 (RISB_SULIN) 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:	YN1551_1107

Organism

Sulfolobus islandicus (strain Y.N.15.51 / Yellowstone #2) [Complete proteome] [HAMAP]

Taxonomic identifier

419942 [NCBI]

Taxonomic lineage

Archaea › Crenarchaeota › Thermoprotei › Sulfolobales › Sulfolobaceae › Sulfolobus

Protein attributes

Sequence length	154 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 – 154	154	6,7-dimethyl-8-ribityllumazine synthase HAMAP MF_00178		PRO_1000203804

Sequences

	Sequence		Length	Mass (Da)
	C3NGF3 [UniParc]. Last modified June 16, 2009. Version 1. Checksum: AB2FC15E77276D26	FASTA	154	17,163
	10 20 30 40 50 60 MQEKSIRLGI VVAEFNYDIT QLMLQKALSH AKFLNAEVKV VIKVPGTFDM PLAIKKLLEK 70 80 90 100 110 120 DFIDAVVTLG AVIKGETKHD EIVASQTARK IVDLSTEFNK PVTLGIIGHG ATHEQAVERI 130 140 150 EEYATRAVEA AIKLVQRTRK IDELKEVKET VIID

References

[1]	"Biogeography of the Sulfolobus islandicus pan-genome." Reno M.L., Held N.L., Fields C.J., Burke P.V., Whitaker R.J. Proc. Natl. Acad. Sci. U.S.A. 106:8605-8610(2009) [PubMed: 19435847] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Y.N.15.51 / Yellowstone #2.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP001404 Genomic DNA. Translation: ACP48213.1.
RefSeq	YP_002840135.1. NC_012623.1.
3D structure databases
ModBase	Search...
Protein-protein interaction databases
STRING	C3NGF3.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
GeneID	7810838.
GenomeReviews	Gene locus YN1551_1107 in contig CP001404_GR.
KEGG	sin:YN1551_1107.
Organism-specific databases
CMR	Search...
Phylogenomic databases
OMA	IQGATKH.
ProtClustDB	PRK00061.
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_SULIN

Accession

Primary (citable) accession number: C3NGF3

Entry history

Integrated into UniProtKB/Swiss-Prot:	September 22, 2009
Last sequence update:	June 16, 2009
Last modified:	November 16, 2011
This is version 18 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program