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EXT1
Homo sapiens · Exostosin-1 (EC 2.4.1.225)
GT47Model organism · annotation ≥ 4Fold GT-BInverting6 PDB structure(s)
External resources
Identification and annotation
| CAZy family | GT47 · CAZy entry |
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| Gene symbol | EXT1 |
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| Synonyms / alternate names | - Exostosin glycosyltransferase 1
- Heparan sulfate co-polymerase subunit EXT1
- Multiple exostoses protein 1
- N-acetylglucosaminyl-proteoglycan 4-beta-glucuronosyltransferase
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| UniProt accession | Q16394 |
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| NCBI Gene ID | 2131 |
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| Source species | Homo sapiens |
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| Taxonomic domain | Eukaryota |
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| UniProt annotation level | 5 |
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Function and localisation
| Enzyme function | Exostosin-1 (EC 2.4.1.225) |
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| Subcellular location | - Golgi apparatus membrane
- Golgi apparatus, cis-Golgi network membrane
- Endoplasmic reticulum membrane
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Structure and mechanism
| Fold type | GT-B |
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| Catalytic mechanism | Inverting |
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| Cation dependence | No |
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| Oligomeric state | Part of the heparan sulfate polymerase, a dimeric complex co |
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| PDB structures | 7SCH, 7SCJ, 7SCK, 7UQX, 7UQY, 7ZAY |
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Donor and acceptor specificity
| Sugar nucleotide donor | UDP-alpha-D-glucuronate |
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| Donor CCD code(s) | UGA |
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| Acceptor substrate(s) | 3-O-{alpha-D-GlcNAc-[(1->4)-beta-D-GlcA-(1->4)-alpha-D-GlcNAc](n)-(1->4)-beta-D-GlcA-(1->3)-beta-D-Gal-(1->3)-beta-D-Gal-(1->4)-beta-D-Xyl}-L-seryl-[protein] |
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| Acceptor CCD / GlycoCT | not curated |
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Protein sequences
Full protein sequence
746 aa
MQAKKRYFILLSAGSCLALLFYFGGLQFRASRSHSRREEHSGRNGLHHPSPDHFWPRFPDALRPFVPWDQLENEDSSVHISPRQKRDANSSIYKGKKCRMESCFDFTLCKKNGFKVYVYPQQKGEKIAESYQNILAAIEGSRFYTSDPSQACLFVLSLDTLDRDQLSPQYVHNLRSKVQSLHLWNNGRNHLIFNLYSGTWPDYTEDVGFDIGQAMLAKASISTENFRPNFDVSIPLFSKDHPRTGGERGFLKFNTIPPLRKYMLVFKGKRYLTGIGSDTRNALYHVHNGEDVVLLTTCKHGKDWQKHKDSRCDRDNTEYEKYDYREMLHNATFCLVPRGRRLGSFRFLEALQAACVPVMLSNGWELPFSEVINWNQAAVIGDERLLLQIPSTIRSIHQDKILALRQQTQFLWEAYFSSVEKIVLTTLEIIQDRIFKHISRNSLIWNKHPGGLFVLPQYSSYLGDFPYYYANLGLKPPSKFTAVIHAVTPLVSQSQPVLKLLVAAAKSQYCAQIIVLWNCDKPLPAKHRWPATAVPVVVIEGESKVMSSRFLPYDNIITDAVLSLDEDTVLSTTEVDFAFTVWQSFPERIVGYPARSHFWDNSKERWGYTSKWTNDYSMVLTGAAIYHKYYHYLYSHYLPASLKNMVDQLANCEDILMNFLVSAVTKLPPIKVTQKKQYKETMMGQTSRASRWADPDHFAQRQSCMNTFASWFGYMPLIHSQMRLDPVLFKDQVSILRKKYRDIERL
Catalytic domain sequence
285 aa
KNGFKVYVYPQQKGEKIAESYQNILAAIEGSRFYTSDPSQACLFVLSLDTLDRDQLSPQYVHNLRSKVQSLHLWNNGRNHLIFNLYSGTWPDYTEDVGFDIGQAMLAKASISTENFRPNFDVSIPLFSKDHPRTGGERGFLKFNTIPPLRKYMLVFKGKRYLTGIGSDTRNALYHVHNGEDVVLLTTCKHGKDWQKHKDSRCDRDNTEYEKYDYREMLHNATFCLVPRGRRLGSFRFLEALQAACVPVMLSNGWELPFSEVINWNQAAVIGDERLLLQIPSTIRS
