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1li1

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{{STRUCTURE_1li1| PDB=1li1 | SCENE= }}
{{STRUCTURE_1li1| PDB=1li1 | SCENE= }}
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'''The 1.9-A crystal structure of the noncollagenous (NC1) domain of human placenta collagen IV shows stabilization via a novel type of covalent Met-Lys cross-link'''
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===The 1.9-A crystal structure of the noncollagenous (NC1) domain of human placenta collagen IV shows stabilization via a novel type of covalent Met-Lys cross-link===
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==Overview==
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Triple-helical collagen IV protomers associate through their N- and C-termini forming a three-dimensional network, which provides basement membranes with an anchoring scaffold and mechanical strength. The noncollagenous (NC1) domain of the C-terminal junction between two adjacent collagen IV protomers from human placenta was crystallized and its 1.9-A structure was solved by multiple anomalous diffraction (MAD) phasing. This hexameric NC1 particle is composed of two trimeric caps, which interact through a large planar interface. Each cap is formed by two alpha 1 fragments and one alpha 2 fragment with a similar previously uncharacterized fold, segmentally arranged around an axial tunnel. Each monomer chain folds into two structurally very similar subdomains, which each contain a finger-like hairpin loop that inserts into a six-stranded beta-sheet of the neighboring subdomain of the same or the adjacent chain. Thus each trimer forms a quite regular, but nonclassical, sixfold propeller. The trimer-trimer interaction is further stabilized by a previously uncharacterized type of covalent cross-link between the side chains of a Met and a Lys residue of the alpha 1 and alpha 2 chains from opposite trimers, explaining previous findings of nonreducible cross-links in NC1. This structure provides insights into NC1-related diseases such as Goodpasture and Alport syndromes.
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(as it appears on PubMed at http://www.pubmed.gov), where 12011424 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12011424}}
==About this Structure==
==About this Structure==
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[[Category: Nc1 domain]]
[[Category: Nc1 domain]]
[[Category: Protein-protein interaction]]
[[Category: Protein-protein interaction]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:56:25 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 20:57:11 2008''

Revision as of 17:57, 2 July 2008

Image:1li1.png

Template:STRUCTURE 1li1

The 1.9-A crystal structure of the noncollagenous (NC1) domain of human placenta collagen IV shows stabilization via a novel type of covalent Met-Lys cross-link

Template:ABSTRACT PUBMED 12011424

About this Structure

1LI1 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

The 1.9-A crystal structure of the noncollagenous (NC1) domain of human placenta collagen IV shows stabilization via a novel type of covalent Met-Lys cross-link., Than ME, Henrich S, Huber R, Ries A, Mann K, Kuhn K, Timpl R, Bourenkov GP, Bartunik HD, Bode W, Proc Natl Acad Sci U S A. 2002 May 14;99(10):6607-12. PMID:12011424

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