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2d7i
From Proteopedia
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| - | [[Image:2d7i.jpg|left|200px]] | + | [[Image:2d7i.jpg|left|200px]] |
| - | + | ||
| - | '''Crsytal structure of pp-GalNAc-T10 with UDP, GalNAc and Mn2+''' | + | {{Structure |
| + | |PDB= 2d7i |SIZE=350|CAPTION= <scene name='initialview01'>2d7i</scene>, resolution 2.5Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NGA:N-ACETYL-D-GALACTOSAMINE'>NGA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene> and <scene name='pdbligand=UDP:URIDINE-5'-DIPHOSPHATE'>UDP</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Polypeptide_N-acetylgalactosaminyltransferase Polypeptide N-acetylgalactosaminyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.41 2.4.1.41] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Crsytal structure of pp-GalNAc-T10 with UDP, GalNAc and Mn2+''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2D7I is a [ | + | 2D7I is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2D7I OCA]. |
==Reference== | ==Reference== | ||
| - | Structural basis of carbohydrate transfer activity by human UDP-GalNAc: polypeptide alpha-N-acetylgalactosaminyltransferase (pp-GalNAc-T10)., Kubota T, Shiba T, Sugioka S, Furukawa S, Sawaki H, Kato R, Wakatsuki S, Narimatsu H, J Mol Biol. 2006 Jun 9;359(3):708-27. Epub 2006 Apr 19. PMID:[http:// | + | Structural basis of carbohydrate transfer activity by human UDP-GalNAc: polypeptide alpha-N-acetylgalactosaminyltransferase (pp-GalNAc-T10)., Kubota T, Shiba T, Sugioka S, Furukawa S, Sawaki H, Kato R, Wakatsuki S, Narimatsu H, J Mol Biol. 2006 Jun 9;359(3):708-27. Epub 2006 Apr 19. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16650853 16650853] |
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Polypeptide N-acetylgalactosaminyltransferase]] | [[Category: Polypeptide N-acetylgalactosaminyltransferase]] | ||
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[[Category: rossmann fold]] | [[Category: rossmann fold]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:23:57 2008'' |
Revision as of 14:23, 20 March 2008
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| , resolution 2.5Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , and | ||||||
| Activity: | Polypeptide N-acetylgalactosaminyltransferase, with EC number 2.4.1.41 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crsytal structure of pp-GalNAc-T10 with UDP, GalNAc and Mn2+
Overview
Mucin-type O-glycans are important carbohydrate chains involved in differentiation and malignant transformation. Biosynthesis of the O-glycan is initiated by the transfer of N-acetylgalactosamine (GalNAc) which is catalyzed by UDP-GalNAc:polypeptide alpha-N-acetylgalactosaminyltransferases (pp-GalNAc-Ts). Here we present crystal structures of the pp-GalNAc-T10 isozyme, which has specificity for glycosylated peptides, in complex with the hydrolyzed donor substrate UDP-GalNAc and in complex with GalNAc-serine. A structural comparison with uncomplexed pp-GalNAc-T1 suggests that substantial conformational changes occur in two loops near the catalytic center upon donor substrate binding, and that a distinct interdomain arrangement between the catalytic and lectin domains forms a narrow cleft for acceptor substrates. The distance between the catalytic center and the carbohydrate-binding site on the lectin beta sub-domain influences the position of GalNAc glycosylation on GalNAc-glycosylated peptide substrates. A chimeric enzyme in which the two domains of pp-GalNAc-T10 are connected by a linker from pp-GalNAc-T1 acquires activity toward non-glycosylated acceptors, identifying a potential mechanism for generating the various acceptor specificities in different isozymes to produce a wide range of O-glycans.
About this Structure
2D7I is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural basis of carbohydrate transfer activity by human UDP-GalNAc: polypeptide alpha-N-acetylgalactosaminyltransferase (pp-GalNAc-T10)., Kubota T, Shiba T, Sugioka S, Furukawa S, Sawaki H, Kato R, Wakatsuki S, Narimatsu H, J Mol Biol. 2006 Jun 9;359(3):708-27. Epub 2006 Apr 19. PMID:16650853
Page seeded by OCA on Thu Mar 20 16:23:57 2008
