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otsA
Escherichia coli (strain K12) · Trehalose-6-phosphate synthase (EC 2.4.1.15)
GT20Model organism · annotation ≥ 4Fold GT-BRetaining5 PDB structure(s)
External resources
Identification and annotation
| CAZy family | GT20 · CAZy entry |
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| Gene symbol | otsA |
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| Synonyms / alternate names | - Alpha,alpha-trehalose-phosphate synthase [UDP-forming]
- Osmoregulatory trehalose synthesis protein A
- UDP-glucose-glucosephosphate glucosyltransferase
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| UniProt accession | P31677 |
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| NCBI Gene ID | 93776199; 946405 |
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| Source species | Escherichia coli (strain K12) |
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| Taxonomic domain | Bacteria |
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| UniProt annotation level | 5 |
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Function and localisation
| Enzyme function | Trehalose-6-phosphate synthase (EC 2.4.1.15) |
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| Subcellular location | not curated |
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Structure and mechanism
| Fold type | GT-B |
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| Catalytic mechanism | Retaining |
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| Cation dependence | No |
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| Oligomeric state | homotetramer |
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| PDB structures | 1GZ5, 1UQT, 1UQU, 2WTX, 6JAK |
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Donor and acceptor specificity
| Sugar nucleotide donor | UDP-alpha-D-glucose |
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| Donor CCD code(s) | UPG |
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| Acceptor substrate(s) | D-glucose 6-phosphate |
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| Acceptor CCD / GlycoCT | not curated |
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Protein sequences
Full protein sequence
474 aa
MSRLVVVSNRIAPPDEHAASAGGLAVGILGALKAAGGLWFGWSGETGNEDQPLKKVKKGNITWASFNLSEQDLDEYYNQFSNAVLWPAFHYRLDLVQFQRPAWDGYLRVNALLADKLLPLLQDDDIIWIHDYHLLPFAHELRKRGVNNRIGFFLHIPFPTPEIFNALPTYDTLLEQLCDYDLLGFQTENDRLAFLDCLSNLTRVTTRSAKSHTAWGKAFRTEVYPIGIEPKEIAKQAAGPLPPKLAQLKAELKNVQNIFSVERLDYSKGLPERFLAYEALLEKYPQHHGKIRYTQIAPTSRGDVQAYQDIRHQLENEAGRINGKYGQLGWTPLYYLNQHFDRKLLMKIFRYSDVGLVTPLRDGMNLVAKEYVAAQDPANPGVLVLSQFAGAANELTSALIVNPYDRDEVAAALDRALTMSLAERISRHAEMLDVIVKNDINHWQECFISDLKQIVPRSAESQQRDKVATFPKLA
Catalytic domain sequence
450 aa
RLVVVSNRIAPPDEHAASAGGLAVGILGALKAAGGLWFGWSGETGNEDQPLKKVKKGNITWASFNLSEQDLDEYYNQFSNAVLWPAFHYRLDLVQFQRPAWDGYLRVNALLADKLLPLLQDDDIIWIHDYHLLPFAHELRKRGVNNRIGFFLHIPFPTPEIFNALPTYDTLLEQLCDYDLLGFQTENDRLAFLDCLSNLTRVTTRSAKSHTAWGKAFRTEVYPIGIEPKEIAKQAAGPLPPKLAQLKAELKNVQNIFSVERLDYSKGLPERFLAYEALLEKYPQHHGKIRYTQIAPTSRGDVQAYQDIRHQLENEAGRINGKYGQLGWTPLYYLNQHFDRKLLMKIFRYSDVGLVTPLRDGMNLVAKEYVAAQDPANPGVLVLSQFAGAANELTSALIVNPYDRDEVAAALDRALTMSLAERISRHAEMLDVIVKNDINHWQECFISDLK
