4d0t

From Proteopedia

(Difference between revisions)

Revision as of 09:45, 20 March 2019

GalNAc-T2 crystal soaked with UDP-GalNAc, EA2 peptide and manganese

Structural highlights

4d0t is a 8 chain structure with sequence from Human and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
Related:	4d0z, 4d11
Activity:	Polypeptide N-acetylgalactosaminyltransferase, with EC number 2.4.1.41
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[GALT2_HUMAN] Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor. Has a broad spectrum of substrates for peptides such as EA2, Muc5AC, Muc1a, Muc1b. Probably involved in O-linked glycosylation of the immunoglobulin A1 (IgA1) hinge region.^[1] ^[2]

Publication Abstract from PubMed

The retaining glycosyltransferase GalNAc-T2 is a member of a large family of human polypeptide GalNAc-transferases that is responsible for the post-translational modification of many cell-surface proteins. By the use of combined structural and computational approaches, we provide the first set of structural snapshots of the enzyme during the catalytic cycle and combine these with quantum-mechanics/molecular-mechanics (QM/MM) metadynamics to unravel the catalytic mechanism of this retaining enzyme at the atomic-electronic level of detail. Our study provides a detailed structural rationale for an ordered bi-bi kinetic mechanism and reveals critical aspects of substrate recognition, which dictate the specificity for acceptor Thr versus Ser residues and enforce a front-face SN i-type reaction in which the substrate N-acetyl sugar substituent coordinates efficient glycosyl transfer.

Substrate-Guided Front-Face Reaction Revealed by Combined Structural Snapshots and Metadynamics for the Polypeptide N-Acetylgalactosaminyltransferase 2.,Lira-Navarrete E, Iglesias-Fernandez J, Zandberg WF, Companon I, Kong Y, Corzana F, Pinto BM, Clausen H, Peregrina JM, Vocadlo DJ, Rovira C, Hurtado-Guerrero R Angew Chem Int Ed Engl. 2014 Jun 20. doi: 10.1002/anie.201402781. PMID:24954443^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Wandall HH, Hassan H, Mirgorodskaya E, Kristensen AK, Roepstorff P, Bennett EP, Nielsen PA, Hollingsworth MA, Burchell J, Taylor-Papadimitriou J, Clausen H. Substrate specificities of three members of the human UDP-N-acetyl-alpha-D-galactosamine:Polypeptide N-acetylgalactosaminyltransferase family, GalNAc-T1, -T2, and -T3. J Biol Chem. 1997 Sep 19;272(38):23503-14. PMID:9295285
↑ Iwasaki H, Zhang Y, Tachibana K, Gotoh M, Kikuchi N, Kwon YD, Togayachi A, Kudo T, Kubota T, Narimatsu H. Initiation of O-glycan synthesis in IgA1 hinge region is determined by a single enzyme, UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase 2. J Biol Chem. 2003 Feb 21;278(8):5613-21. Epub 2002 Nov 15. PMID:12438318 doi:http://dx.doi.org/10.1074/jbc.M211097200
↑ Lira-Navarrete E, Iglesias-Fernandez J, Zandberg WF, Companon I, Kong Y, Corzana F, Pinto BM, Clausen H, Peregrina JM, Vocadlo DJ, Rovira C, Hurtado-Guerrero R. Substrate-Guided Front-Face Reaction Revealed by Combined Structural Snapshots and Metadynamics for the Polypeptide N-Acetylgalactosaminyltransferase 2. Angew Chem Int Ed Engl. 2014 Jun 20. doi: 10.1002/anie.201402781. PMID:24954443 doi:http://dx.doi.org/10.1002/anie.201402781

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4d0t"

@@ Line 1: / Line 1: @@
 ==GalNAc-T2 crystal soaked with UDP-GalNAc, EA2 peptide and manganese==
-<StructureSection load='4d0t' size='340' side='right' caption='[[4d0t]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
+<StructureSection load='4d0t' size='340' side='right'caption='[[4d0t]], [[Resolution|resolution]] 2.45&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4d0t]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D0T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4D0T FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4d0t]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human] and [http://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D0T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4D0T FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=NGA:N-ACETYL-D-GALACTOSAMINE'>NGA</scene>, <scene name='pdbligand=UD2:URIDINE-DIPHOSPHATE-N-ACETYLGALACTOSAMINE'>UD2</scene>, <scene name='pdbligand=UDP:URIDINE-5-DIPHOSPHATE'>UDP</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4d0z|4d0z]], [[4d11|4d11]]</td></tr>
@@ Line 24: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Polypeptide N-acetylgalactosaminyltransferase]]
 [[Category: Synthetic construct]]

4d0t

From Proteopedia

Revision as of 09:45, 20 March 2019

GalNAc-T2 crystal soaked with UDP-GalNAc, EA2 peptide and manganese

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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