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Protein

Trehalose-6-phosphate synthase

Gene

otsA

Organism
Escherichia coli (strain ATCC 8739 / DSM 1576 / Crooks)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Probably involved in the osmoprotection via the biosynthesis of trehalose. Catalyzes the transfer of glucose from UDP-glucose (UDP-Glc) to D-glucose 6-phosphate (Glc-6-P) to form trehalose-6-phosphate. Acts with retention of the anomeric configuration of the UDP-sugar donor.By similarity

Catalytic activityi

UDP-glucose + D-glucose 6-phosphate = UDP + alpha,alpha-trehalose 6-phosphate.By similarity

Pathwayi: trehalose biosynthesis

This protein is involved in the pathway trehalose biosynthesis, which is part of Glycan biosynthesis.By similarity
View all proteins of this organism that are known to be involved in the pathway trehalose biosynthesis and in Glycan biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei10D-glucose 6-phosphateBy similarity1
Binding sitei77D-glucose 6-phosphateBy similarity1
Sitei86Involved in alpha anomer selectivityBy similarity1
Binding sitei131D-glucose 6-phosphateBy similarity1
Sitei156Involved in alpha anomer selectivityBy similarity1
Binding sitei263UDP-glucoseBy similarity1
Binding sitei268UDP-glucoseBy similarity1
Binding sitei301D-glucose 6-phosphateBy similarity1
Binding sitei340UDP-glucose; via amide nitrogen and carbonyl oxygenBy similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionGlycosyltransferase, Transferase

Enzyme and pathway databases

UniPathwayiUPA00299.

Protein family/group databases

CAZyiGT20. Glycosyltransferase Family 20.

Names & Taxonomyi

Protein namesi
Recommended name:
Trehalose-6-phosphate synthaseBy similarity (EC:2.4.1.15By similarity)
Short name:
TPSBy similarity
Alternative name(s):
Alpha,alpha-trehalose-phosphate synthase [UDP-forming]By similarity
Osmoregulatory trehalose synthesis protein ABy similarity
Short name:
OtsABy similarity
UDP-glucose-glucosephosphate glucosyltransferaseBy similarity
Gene namesi
Name:otsABy similarity
Ordered Locus Names:EcolC_1738
OrganismiEscherichia coli (strain ATCC 8739 / DSM 1576 / Crooks)
Taxonomic identifieri481805 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003488931 – 474Trehalose-6-phosphate synthaseAdd BLAST474

Interactioni

Subunit structurei

Homotetramer.By similarity

Structurei

3D structure databases

ProteinModelPortaliB1J0J4.
SMRiB1J0J4.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni22 – 23UDP-glucose bindingBy similarity2
Regioni366 – 370UDP-glucose bindingBy similarity5

Sequence similaritiesi

Belongs to the glycosyltransferase 20 family.By similarity

Phylogenomic databases

eggNOGiENOG4105C1K. Bacteria.
COG0380. LUCA.
HOGENOMiHOG000191478.
KOiK00697.
OMAiIEFMPIH.

Family and domain databases

CDDicd03788. GT1_TPS. 1 hit.
InterProiView protein in InterPro
IPR001830. Glyco_trans_20.
IPR012766. Trehalose_OtsA.
PfamiView protein in Pfam
PF00982. Glyco_transf_20. 1 hit.
TIGRFAMsiTIGR02400. trehalose_OtsA. 1 hit.

Sequencei

Sequence statusi: Complete.

B1J0J4-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSRLVVVSNR IAPPDEHAAS AGGLAVGILG ALKAAGGLWF GWSGETGNED
60 70 80 90 100
QPLKKVKKGN ITWASFNLSE QDLDEYYNQF SNAVLWPAFH YRLDLVQFQR
110 120 130 140 150
PAWDGYLRVN ALLADKLLPL LQDDDIIWIH DYHLLPFAHE LRKRGVNNRI
160 170 180 190 200
GFFLHIPFPT PEIFNALPTY DTLLEQLCDY DLLGFQTEND RLAFLDCLSN
210 220 230 240 250
LTRVTTRSAK SHTAWGKAFR TEVYPIGIEP KEIAKQAAGP LPPKLAQLKA
260 270 280 290 300
ELKNVQNIFS VERLDYSKGL PERFLAYEAL LEKYPQHHGK IRYTQIAPTS
310 320 330 340 350
RGDVQAYQDI RHQLENEAGR INGKYGQLGW TPLYYLNQHF DRKLLMKIFR
360 370 380 390 400
YSDVGLVTPL RDGMNLVAKE YVAAQDPANP GVLVLSQFAG AANELTSALI
410 420 430 440 450
VNPYDRDEVA AALDRALTMS LAERISRHAE MLDVIVKNDI NHWQECFISD
460 470
LKQIVPRSAE SQQRDKVATF PKLA
Length:474
Mass (Da):53,611
Last modified:April 29, 2008 - v1
Checksum:i63FFB6F938056F95
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000946 Genomic DNA. Translation: ACA77388.1.
RefSeqiWP_001295646.1. NC_010468.1.

Genome annotation databases

EnsemblBacteriaiACA77388; ACA77388; EcolC_1738.
KEGGiecl:EcolC_1738.

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 nameiOTSA_ECOLC
AccessioniPrimary (citable) accession number: B1J0J4
Entry historyiIntegrated into UniProtKB/Swiss-Prot: September 2, 2008
Last sequence update: April 29, 2008
Last modified: July 5, 2017
This is version 52 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

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