1w3b: Difference between revisions

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[[Image:1w3b.gif|left|200px]]
{{Seed}}
[[Image:1w3b.png|left|200px]]


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{{STRUCTURE_1w3b|  PDB=1w3b  |  SCENE=  }}  
{{STRUCTURE_1w3b|  PDB=1w3b  |  SCENE=  }}  


'''THE SUPERHELICAL TPR DOMAIN OF O-LINKED GLCNAC TRANSFERASE REVEALS STRUCTURAL SIMILARITIES TO IMPORTIN ALPHA.'''
===THE SUPERHELICAL TPR DOMAIN OF O-LINKED GLCNAC TRANSFERASE REVEALS STRUCTURAL SIMILARITIES TO IMPORTIN ALPHA.===




==Overview==
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Addition of N-acetylglucosamine (GlcNAc) is a ubiquitous form of intracellular glycosylation catalyzed by the conserved O-linked GlcNAc transferase (OGT). OGT contains an N-terminal domain of tetratricopeptide (TPR) repeats that mediates the recognition of a broad range of target proteins. Components of the nuclear pore complex are major OGT targets, as OGT depletion by RNA interference (RNAi) results in the loss of GlcNAc modification at the nuclear envelope. To gain insight into the mechanism of target recognition, we solved the crystal structure of the homodimeric TPR domain of human OGT, which contains 11.5 TPR repeats. The repeats form an elongated superhelix. The concave surface of the superhelix is lined by absolutely conserved asparagines, in a manner reminiscent of the peptide-binding site of importin alpha. Based on this structural similarity, we propose that OGT uses an analogous molecular mechanism to recognize its targets.
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(as it appears on PubMed at http://www.pubmed.gov), where 15361863 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15361863}}


==About this Structure==
==About this Structure==
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[[Category: Tpr repeat]]
[[Category: Tpr repeat]]
[[Category: Transferase]]
[[Category: Transferase]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 13:06:00 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 14:54:12 2008''

Revision as of 11:54, 27 July 2008

File:1w3b.png

Template:STRUCTURE 1w3b

THE SUPERHELICAL TPR DOMAIN OF O-LINKED GLCNAC TRANSFERASE REVEALS STRUCTURAL SIMILARITIES TO IMPORTIN ALPHA.

Template:ABSTRACT PUBMED 15361863

About this Structure

1W3B is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

The superhelical TPR-repeat domain of O-linked GlcNAc transferase exhibits structural similarities to importin alpha., Jinek M, Rehwinkel J, Lazarus BD, Izaurralde E, Hanover JA, Conti E, Nat Struct Mol Biol. 2004 Oct;11(10):1001-7. Epub 2004 Sep 12. PMID:15361863

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