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Protein

Tryptophan synthase beta chain

Gene

trpB

Organism
Rhizobium meliloti (strain 1021) (Ensifer meliloti) (Sinorhizobium meliloti)
Status
Reviewed-Annotation score: Annotation score: 2 out of 5-Protein inferred from homologyi

Functioni

The beta subunit is responsible for the synthesis of L-tryptophan from indole and L-serine.UniRule annotation

Catalytic activityi

L-serine + 1-C-(indol-3-yl)glycerol 3-phosphate = L-tryptophan + D-glyceraldehyde 3-phosphate + H2O.UniRule annotation

Cofactori

pyridoxal 5'-phosphateUniRule annotation

Pathwayi: L-tryptophan biosynthesis

This protein is involved in step 5 of the subpathway that synthesizes L-tryptophan from chorismate.UniRule annotation
Proteins known to be involved in the 5 steps of the subpathway in this organism are:
  1. Anthranilate synthase (trpE(G))
  2. Anthranilate phosphoribosyltransferase (trpD)
  3. N-(5'-phosphoribosyl)anthranilate isomerase (trpF)
  4. Indole-3-glycerol phosphate synthase (trpC)
  5. Tryptophan synthase beta chain (trpB), Tryptophan synthase alpha chain (trpA)
This subpathway is part of the pathway L-tryptophan biosynthesis, which is itself part of Amino-acid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes L-tryptophan from chorismate, the pathway L-tryptophan biosynthesis and in Amino-acid biosynthesis.

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Lyase

Keywords - Biological processi

Amino-acid biosynthesis, Aromatic amino acid biosynthesis, Tryptophan biosynthesis

Keywords - Ligandi

Pyridoxal phosphate

Enzyme and pathway databases

UniPathwayiUPA00035; UER00044.

Names & Taxonomyi

Protein namesi
Recommended name:
Tryptophan synthase beta chainUniRule annotation (EC:4.2.1.20UniRule annotation)
Gene namesi
Name:trpBUniRule annotation
Ordered Locus Names:R00028
ORF Names:SMc02766
OrganismiRhizobium meliloti (strain 1021) (Ensifer meliloti) (Sinorhizobium meliloti)
Taxonomic identifieri266834 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaAlphaproteobacteriaRhizobialesRhizobiaceaeSinorhizobium/Ensifer groupSinorhizobium
Proteomesi
  • UP000001976 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000989901 – 406Tryptophan synthase beta chainAdd BLAST406

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei99N6-(pyridoxal phosphate)lysineUniRule annotation1

Interactioni

Subunit structurei

Tetramer of two alpha and two beta chains.UniRule annotation

Protein-protein interaction databases

STRINGi266834.SMc02766.

Structurei

3D structure databases

ProteinModelPortaliQ92TC9.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the TrpB family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105CG0. Bacteria.
COG0133. LUCA.
HOGENOMiHOG000161710.
KOiK01696.
OMAiEHSWLND.

Family and domain databases

CDDicd06446. Trp-synth_B. 1 hit.
HAMAPiMF_00133. Trp_synth_beta. 1 hit.
InterProiIPR006653. Trp_synth_b_CS.
IPR006654. Trp_synth_beta.
IPR023026. Trp_synth_beta/beta-like.
IPR001926. TrpB-like_PLP-dep.
[Graphical view]
PfamiPF00291. PALP. 1 hit.
[Graphical view]
PIRSFiPIRSF001413. Trp_syn_beta. 1 hit.
SUPFAMiSSF53686. SSF53686. 1 hit.
TIGRFAMsiTIGR00263. trpB. 1 hit.
PROSITEiPS00168. TRP_SYNTHASE_BETA. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q92TC9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MNQPPKPNSF RSGPDEEGRF GIFGGRFVAE TLMPLILDLQ DEWARAKNDP
60 70 80 90 100
AFKAELENLG THYIGRPSPL YFAERLTAEL GGAKIYFKRE ELNHTGSHKI
110 120 130 140 150
NNCIGQILLA KRMGKTRIIA ETGAGQHGVA SATVAARFGL PCVVYMGATD
160 170 180 190 200
VERQAPNVFR MKLLGAEVKP VTAGNGTLKD AMNEALRDWV TNVDSTYYLI
210 220 230 240 250
GTAAGPHPYP EMVRDFQAVI GEEAKQQILE AEGRLPDLVV AAVGGGSNAI
260 270 280 290 300
GIFHSFLDDE GVRIVGVEAG GKGLDGDEHC ASLTAGSPGV LHGNRTYLLQ
310 320 330 340 350
DGDGQIKEGH SISAGLDYPG IGPEHAWLND IGRVEYVPIM DHEALEAFQT
360 370 380 390 400
LTRLEGIIPA LEPSHALAEV IKRAPKMGKD EIILMNLSGR GDKDIFTVGK

ILGMGQ
Length:406
Mass (Da):43,716
Last modified:December 1, 2001 - v1
Checksum:iC3FD389E8197D7C0
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AL591688 Genomic DNA. Translation: CAC41415.1.
RefSeqiNP_384134.1. NC_003047.1.
WP_003536446.1. NC_003047.1.

Genome annotation databases

EnsemblBacteriaiCAC41415; CAC41415; SMc02766.
GeneIDi1231653.
KEGGisme:SMc02766.
PATRICi23629207. VBISinMel96828_1381.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AL591688 Genomic DNA. Translation: CAC41415.1.
RefSeqiNP_384134.1. NC_003047.1.
WP_003536446.1. NC_003047.1.

3D structure databases

ProteinModelPortaliQ92TC9.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi266834.SMc02766.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAC41415; CAC41415; SMc02766.
GeneIDi1231653.
KEGGisme:SMc02766.
PATRICi23629207. VBISinMel96828_1381.

Phylogenomic databases

eggNOGiENOG4105CG0. Bacteria.
COG0133. LUCA.
HOGENOMiHOG000161710.
KOiK01696.
OMAiEHSWLND.

Enzyme and pathway databases

UniPathwayiUPA00035; UER00044.

Family and domain databases

CDDicd06446. Trp-synth_B. 1 hit.
HAMAPiMF_00133. Trp_synth_beta. 1 hit.
InterProiIPR006653. Trp_synth_b_CS.
IPR006654. Trp_synth_beta.
IPR023026. Trp_synth_beta/beta-like.
IPR001926. TrpB-like_PLP-dep.
[Graphical view]
PfamiPF00291. PALP. 1 hit.
[Graphical view]
PIRSFiPIRSF001413. Trp_syn_beta. 1 hit.
SUPFAMiSSF53686. SSF53686. 1 hit.
TIGRFAMsiTIGR00263. trpB. 1 hit.
PROSITEiPS00168. TRP_SYNTHASE_BETA. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiTRPB_RHIME
AccessioniPrimary (citable) accession number: Q92TC9
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 3, 2002
Last sequence update: December 1, 2001
Last modified: November 30, 2016
This is version 91 of the entry and version 1 of the sequence. [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

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.