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Protein

Biotin synthase

Gene

bioB

Organism
Cyanothece sp. (strain PCC 8801) (Synechococcus sp. (strain PCC 8801 / RF-1))
Status
Reviewed-Annotation score: -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 bindingi92Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi96Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi99Iron-sulfur 1 (4Fe-4S-S-AdoMet)UniRule annotation1
Metal bindingi137Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi174Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi234Iron-sulfur 2 (2Fe-2S)UniRule annotation1
Metal bindingi304Iron-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:PCC8801_0144
OrganismiCyanothece sp. (strain PCC 8801) (Synechococcus sp. (strain PCC 8801 / RF-1))
Taxonomic identifieri41431 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaOscillatoriophycideaeOscillatorialesCyanothecaceaeCyanothece
Proteomesi
  • UP000008204 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003813401 – 368Biotin synthaseAdd BLAST368

Proteomic databases

PRIDEiB7K1U3

Interactioni

Subunit structurei

Homodimer.UniRule annotation

Protein-protein interaction databases

STRINGi41431.PCC8801_0144

Structurei

3D structure databases

ProteinModelPortaliB7K1U3
SMRiB7K1U3
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

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

Phylogenomic databases

eggNOGiENOG4107QSQ Bacteria
COG0502 LUCA
HOGENOMiHOG000239958
KOiK01012
OMAiADRFCMG
OrthoDBiPOG091H01DF

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
IPR034416 BATS_domain_containing
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
SFLDiSFLDG01060 BATS_domain_containing, 1 hit
SFLDG01278 biotin_synthase_like, 1 hit
SFLDS00029 Radical_SAM, 1 hit
SMARTiView protein in SMART
SM00876 BATS, 1 hit
SM00729 Elp3, 1 hit
TIGRFAMsiTIGR00433 bioB, 1 hit

Sequencei

Sequence statusi: Complete.

B7K1U3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MVQAPLSPSL LQTQSISQPP QETEALKAWL EELTQKIIEG DRINKSEALT
60 70 80 90 100
LTQIEGQDSI LLLCEAADRI RQACCGNVVD LCSIINIKSG NCSENCRFCS
110 120 130 140 150
QSVYHPGENS PIYGLKSSEE ILAQAKAAEA AGAKRFCLVS QGRGPKYQGA
160 170 180 190 200
KSKEFEQILA TVRQIAAETS IKPCCALGEV TPEQAQALRE AGVTRYNHNL
210 220 230 240 250
EASEGFYPEI VTSHSWRDRV ETIKNLKAAG IQACSGGIMG MGETWEDRVD
260 270 280 290 300
LALALRELGV ESVPINLLNP REGTPLGDCH RLDPFEALKA IAIFRLILPQ
310 320 330 340 350
QILRYAGGRE AIMGDLQSLG LKSGINAMLI GHYLTTLGQP PEKDLAMVES
360
LGLQGGEAPI PGEYQTRS
Length:368
Mass (Da):39,902
Last modified:February 10, 2009 - v1
Checksum:i8C58830EC4590781
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP001287 Genomic DNA Translation: ACK64250.1
RefSeqiWP_012593527.1, NC_011726.1

Genome annotation databases

EnsemblBacteriaiACK64250; ACK64250; PCC8801_0144
KEGGicyp:PCC8801_0144

Similar proteinsi

Entry informationi

Entry nameiBIOB_CYAP8
AccessioniPrimary (citable) accession number: B7K1U3
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: February 10, 2009
Last modified: May 23, 2018
This is version 56 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

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