ID OTSA_KLEP7 Reviewed; 474 AA.
AC A6TB47;
DT 02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT 21-AUG-2007, sequence version 1.
DT 27-MAR-2024, entry version 79.
DE RecName: Full=Trehalose-6-phosphate synthase {ECO:0000250|UniProtKB:P31677};
DE Short=TPS {ECO:0000250|UniProtKB:P31677};
DE EC=2.4.1.15 {ECO:0000250|UniProtKB:P31677};
DE AltName: Full=Alpha,alpha-trehalose-phosphate synthase [UDP-forming] {ECO:0000250|UniProtKB:P31677};
DE AltName: Full=Osmoregulatory trehalose synthesis protein A {ECO:0000250|UniProtKB:P31677};
DE Short=OtsA {ECO:0000250|UniProtKB:P31677};
DE AltName: Full=UDP-glucose-glucosephosphate glucosyltransferase {ECO:0000250|UniProtKB:P31677};
GN Name=otsA {ECO:0000250|UniProtKB:P31677}; OrderedLocusNames=KPN78578_23570;
GN ORFNames=KPN_02392;
OS Klebsiella pneumoniae subsp. pneumoniae (strain ATCC 700721 / MGH 78578).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Klebsiella/Raoultella group; Klebsiella.
OX NCBI_TaxID=272620;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700721 / MGH 78578;
RG The Klebsiella pneumonia Genome Sequencing Project;
RA McClelland M., Sanderson E.K., Spieth J., Clifton W.S., Latreille P.,
RA Sabo A., Pepin K., Bhonagiri V., Porwollik S., Ali J., Wilson R.K.;
RL Submitted (SEP-2006) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Probably involved in the osmoprotection via the biosynthesis
CC of trehalose. Catalyzes the transfer of glucose from UDP-alpha-D-
CC glucose (UDP-Glc) to D-glucose 6-phosphate (Glc-6-P) to form trehalose-
CC 6-phosphate. Acts with retention of the anomeric configuration of the
CC UDP-sugar donor. {ECO:0000250|UniProtKB:P31677}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=D-glucose 6-phosphate + UDP-alpha-D-glucose = alpha,alpha-
CC trehalose 6-phosphate + H(+) + UDP; Xref=Rhea:RHEA:18889,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:58223, ChEBI:CHEBI:58429,
CC ChEBI:CHEBI:58885, ChEBI:CHEBI:61548; EC=2.4.1.15;
CC Evidence={ECO:0000250|UniProtKB:P31677};
CC -!- PATHWAY: Glycan biosynthesis; trehalose biosynthesis.
CC {ECO:0000250|UniProtKB:P31677}.
CC -!- SUBUNIT: Homotetramer. {ECO:0000250|UniProtKB:P31677}.
CC -!- SIMILARITY: Belongs to the glycosyltransferase 20 family.
CC {ECO:0000250|UniProtKB:P31677}.
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DR EMBL; CP000647; ABR77818.1; -; Genomic_DNA.
DR RefSeq; WP_004175414.1; NC_009648.1.
DR AlphaFoldDB; A6TB47; -.
DR SMR; A6TB47; -.
DR STRING; 272620.KPN_02392; -.
DR CAZy; GT20; Glycosyltransferase Family 20.
DR jPOST; A6TB47; -.
DR PaxDb; 272620-KPN_02392; -.
DR EnsemblBacteria; ABR77818; ABR77818; KPN_02392.
DR KEGG; kpn:KPN_02392; -.
DR HOGENOM; CLU_002351_7_1_6; -.
DR UniPathway; UPA00299; -.
DR Proteomes; UP000000265; Chromosome.
DR GO; GO:0003825; F:alpha,alpha-trehalose-phosphate synthase (UDP-forming) activity; IEA:UniProtKB-EC.
DR GO; GO:0005992; P:trehalose biosynthetic process; IEA:UniProtKB-UniPathway.
DR CDD; cd03788; GT20_TPS; 1.
DR Gene3D; 3.40.50.2000; Glycogen Phosphorylase B; 2.
DR InterPro; IPR001830; Glyco_trans_20.
DR InterPro; IPR012766; Trehalose_OtsA.
DR NCBIfam; TIGR02400; trehalose_OtsA; 1.
DR PANTHER; PTHR10788:SF106; BCDNA.GH08860; 1.
DR PANTHER; PTHR10788; TREHALOSE-6-PHOSPHATE SYNTHASE; 1.
DR Pfam; PF00982; Glyco_transf_20; 1.
DR SUPFAM; SSF53756; UDP-Glycosyltransferase/glycogen phosphorylase; 1.
PE 3: Inferred from homology;
KW Glycosyltransferase; Transferase.
FT CHAIN 1..474
FT /note="Trehalose-6-phosphate synthase"
FT /id="PRO_0000348902"
FT BINDING 10
FT /ligand="D-glucose 6-phosphate"
FT /ligand_id="ChEBI:CHEBI:61548"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 22..23
FT /ligand="UDP-alpha-D-glucose"
FT /ligand_id="ChEBI:CHEBI:58885"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 77
FT /ligand="D-glucose 6-phosphate"
FT /ligand_id="ChEBI:CHEBI:61548"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 131
FT /ligand="D-glucose 6-phosphate"
FT /ligand_id="ChEBI:CHEBI:61548"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 263
FT /ligand="UDP-alpha-D-glucose"
FT /ligand_id="ChEBI:CHEBI:58885"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 268
FT /ligand="UDP-alpha-D-glucose"
FT /ligand_id="ChEBI:CHEBI:58885"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 301
FT /ligand="D-glucose 6-phosphate"
FT /ligand_id="ChEBI:CHEBI:61548"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 340
FT /ligand="UDP-alpha-D-glucose"
FT /ligand_id="ChEBI:CHEBI:58885"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT BINDING 366..370
FT /ligand="UDP-alpha-D-glucose"
FT /ligand_id="ChEBI:CHEBI:58885"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT SITE 86
FT /note="Involved in alpha anomer selectivity"
FT /evidence="ECO:0000250|UniProtKB:P31677"
FT SITE 156
FT /note="Involved in alpha anomer selectivity"
FT /evidence="ECO:0000250|UniProtKB:P31677"
SQ SEQUENCE 474 AA; 53813 MW; B022E7320D3BBD79 CRC64;
MSRLVVVSNR IALPDDKKSS AGGLAVGILG ALRAAGGLWF GWSGEIGDDQ QPLKQVSRGN
ISWASFNLNE RDHDEYYNQF SNAVLWPAFH YRLDLVSFQR EAWEGYLRVN AMLADKLLPL
IEPDDTLWIH DYHLLPFASE LRKRGVNNRI GFFLHIPFPT PEIFNALPPH AELLEQLCDY
DLLGFQTESD RTAFLDSIAM QTRLSDLGDK RYQAWGKAFS TEVYPIGIDP DEITRNAKGP
LPPKLAQLKN ELKNVKNIFS VERLDYSKGL PERFLAYETL LEKYPQHHGK IRYTQIAPTS
RGDVQAYQDI RHQLETAAGR INGQFGQLGW TPLYYLNQHF DRKLLMKVFR YSDVGLVTPL
RDGMNLVAKE YVAAQDPDNP GVLVLSQFAG AAQELTSALI VNPYDRDEVA AALDRALSMP
LAERIARHSA MLDVIRENDI HNWQARFVED LQHISPRSEE SRLRGKIATF PKLA
//
