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1m4u

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[[Image:1m4u.gif|left|200px]]
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{{STRUCTURE_1m4u| PDB=1m4u | SCENE= }}
{{STRUCTURE_1m4u| PDB=1m4u | SCENE= }}
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'''Crystal structure of Bone Morphogenetic Protein-7 (BMP-7) in complex with the secreted antagonist Noggin'''
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===Crystal structure of Bone Morphogenetic Protein-7 (BMP-7) in complex with the secreted antagonist Noggin===
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==Overview==
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The interplay between bone morphogenetic proteins (BMPs) and their antagonists governs developmental and cellular processes as diverse as establishment of the embryonic dorsal-ventral axis, induction of neural tissue, formation of joints in the skeletal system and neurogenesis in the adult brain. So far, the three-dimensional structures of BMP antagonists and the structural basis for inactivation have remained unknown. Here we report the crystal structure of the antagonist Noggin bound to BMP-7, which shows that Noggin inhibits BMP signalling by blocking the molecular interfaces of the binding epitopes for both type I and type II receptors. The BMP-7-binding affinity of site-specific variants of Noggin is correlated with alterations in bone formation and apoptosis in chick limb development, showing that Noggin functions by sequestering its ligand in an inactive complex. The scaffold of Noggin contains a cystine (the oxidized form of cysteine) knot topology similar to that of BMPs; thus, ligand and antagonist seem to have evolved from a common ancestral gene.
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(as it appears on PubMed at http://www.pubmed.gov), where 12478285 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12478285}}
==Disease==
==Disease==
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[[Category: Cystine knot]]
[[Category: Cystine knot]]
[[Category: Noggin]]
[[Category: Noggin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:37:55 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 23:12:42 2008''

Revision as of 20:12, 2 July 2008

Image:1m4u.png

Template:STRUCTURE 1m4u

Contents

Crystal structure of Bone Morphogenetic Protein-7 (BMP-7) in complex with the secreted antagonist Noggin

Template:ABSTRACT PUBMED 12478285

Disease

Known disease associated with this structure: Stapes ankylosis syndrome without symphalangism OMIM:[602991], Symphalangism, proximal OMIM:[602991], Synostoses syndrome, multiple, 1 OMIM:[602991], Tarsal-carpal coalition syndrome OMIM:[602991]

About this Structure

1M4U is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structural basis of BMP signalling inhibition by the cystine knot protein Noggin., Groppe J, Greenwald J, Wiater E, Rodriguez-Leon J, Economides AN, Kwiatkowski W, Affolter M, Vale WW, Belmonte JC, Choe S, Nature. 2002 Dec 12;420(6916):636-42. PMID:12478285

Page seeded by OCA on Wed Jul 2 23:12:42 2008

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