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Protein

Biotin synthase

Gene

bioB

Organism
Bacillus cereus (strain ATCC 14579 / DSM 31 / JCM 2152 / NBRC 15305 / NCIMB 9373 / NRRL B-3711)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the conversion of dethiobiotin (DTB) to biotin by the insertion of a sulfur atom into dethiobiotin via a radical-based mechanism.UniRule annotation

Catalytic activityi

Dethiobiotin + sulfur-(sulfur carrier) + 2 S-adenosyl-L-methionine + 2 reduced [2Fe-2S] ferredoxin = biotin + (sulfur carrier) + 2 L-methionine + 2 5'-deoxyadenosine + 2 oxidized [2Fe-2S] ferredoxin.UniRule annotation

Cofactori

Protein has several cofactor binding sites:
  • [4Fe-4S] clusterUniRule annotationNote: Binds 1 [4Fe-4S] cluster. The cluster is coordinated with 3 cysteines and an exchangeable S-adenosyl-L-methionine.UniRule annotation
  • [2Fe-2S] clusterUniRule annotationNote: Binds 1 [2Fe-2S] cluster. The cluster is coordinated with 3 cysteines and 1 arginine.UniRule annotation

Pathwayi: biotin biosynthesis

This protein is involved in step 2 of the subpathway that synthesizes biotin from 7,8-diaminononanoate.UniRule annotation
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. ATP-dependent dethiobiotin synthetase BioD (bioD)
  2. Biotin synthase (bioB)
This subpathway is part of the pathway biotin biosynthesis, which is itself part of Cofactor biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes biotin from 7,8-diaminononanoate, the pathway biotin biosynthesis and in Cofactor biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi71Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi75Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi78Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi115Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi147Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi207Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi277Iron-sulfur 2 (2Fe-2S)UniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionTransferase
Biological processBiotin biosynthesis
Ligand2Fe-2S, 4Fe-4S, Iron, Iron-sulfur, Metal-binding, S-adenosyl-L-methionine

Enzyme and pathway databases

UniPathwayiUPA00078; UER00162.

Names & Taxonomyi

Protein namesi
Recommended name:
Biotin synthaseUniRule annotation (EC:2.8.1.6UniRule annotation)
Gene namesi
Name:bioBUniRule annotation
Ordered Locus Names:BC_4114
OrganismiBacillus cereus (strain ATCC 14579 / DSM 31 / JCM 2152 / NBRC 15305 / NCIMB 9373 / NRRL B-3711)
Taxonomic identifieri226900 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliBacillalesBacillaceaeBacillusBacillus cereus group
Proteomesi
  • UP000001417 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003812251 – 332Biotin synthaseAdd BLAST332

Proteomic databases

PRIDEiQ818X3.

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi226900.BC4114.

Structurei

3D structure databases

ProteinModelPortaliQ818X3.
SMRiQ818X3.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the radical SAM superfamily. Biotin synthase family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105CZF. Bacteria.
COG0502. LUCA.
KOiK01012.
OMAiADRFCMG.

Family and domain databases

Gene3Di3.20.20.70. 1 hit.
HAMAPiMF_01694. BioB. 1 hit.
InterProiView protein in InterPro
IPR013785. Aldolase_TIM.
IPR010722. BATS_dom.
IPR002684. Biotin_synth/BioAB.
IPR024177. Biotin_synthase.
IPR006638. Elp3/MiaB/NifB.
IPR007197. rSAM.
PANTHERiPTHR22976. PTHR22976. 1 hit.
PfamiView protein in Pfam
PF06968. BATS. 1 hit.
PF04055. Radical_SAM. 1 hit.
PIRSFiPIRSF001619. Biotin_synth. 1 hit.
SFLDiSFLDG01278. biotin_synthase_like. 1 hit.
SMARTiView protein in SMART
SM00876. BATS. 1 hit.
SM00729. Elp3. 1 hit.
TIGRFAMsiTIGR00433. bioB. 1 hit.

Sequencei

Sequence statusi: Complete.

Q818X3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKQVQTKRDW KKLAYDVVEE KMITKEDAIA ILEADDTEVL EIMNAAYIIR
60 70 80 90 100
HHHFGKKVKL NMIINTKSGL CPEDCGYCSQ SIISEAPIDK YAWLTQEKIV
110 120 130 140 150
EGAHEAIRRK AGTYCIVASG RRPTDKEVNH VIGAVKEIRE TTDLKICCCL
160 170 180 190 200
GFLNEDQAGR LAEAGVHRYN HNLDTHANNY DSICSTHTYD DRVDTVQKAK
210 220 230 240 250
QAGISPCSGA IFGMGETIEE RAEIAFELQR IDADSIPCNF LVAVKGTPLE
260 270 280 290 300
GQKELTPVEC LKVLAMMRFV NPTKEIRISG GREINLRSVQ PIGLFAANSI
310 320 330
FVGDYLTTAG QEPTADWGMI ADLGFEIEEC AL
Length:332
Mass (Da):36,899
Last modified:June 1, 2003 - v1
Checksum:iCF38BD68407C8FCE
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE016877 Genomic DNA. Translation: AAP11033.1.
RefSeqiNP_833832.1. NC_004722.1.
WP_000815854.1. NC_004722.1.

Genome annotation databases

EnsemblBacteriaiAAP11033; AAP11033; BC_4114.
GeneIDi1206459.
KEGGibce:BC4114.
PATRICifig|226900.8.peg.4250.

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiBIOB_BACCR
AccessioniPrimary (citable) accession number: Q818X3
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: June 1, 2003
Last modified: June 7, 2017
This is version 99 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families