1k3a

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[[Image:1k3a.gif|left|200px]]
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{{Seed}}
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[[Image:1k3a.png|left|200px]]
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{{STRUCTURE_1k3a| PDB=1k3a | SCENE= }}
{{STRUCTURE_1k3a| PDB=1k3a | SCENE= }}
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'''Structure of the Insulin-like Growth Factor 1 Receptor Kinase'''
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===Structure of the Insulin-like Growth Factor 1 Receptor Kinase===
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==Overview==
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The insulin-like growth factor 1 (IGF1) receptor is closely related to the insulin receptor. However, the unique biological functions of IGF1 receptor make it a target for therapeutic intervention in human cancer. Using its isolated tyrosine kinase domain, we show that the IGF1 receptor is regulated by intermolecular autophosphorylation at three sites within the kinase activation loop. Steady-state kinetic analyses of the isolated phosphorylated forms of the IGF1 receptor kinase (IGF1RK) reveal that each autophosphorylation event increases enzyme turnover number and decreases Km for ATP and peptide. We have determined the 2.1 A-resolution crystal structure of the tris-phosphorylated form of IGF1RK in complex with an ATP analog and a specific peptide substrate. The structure of IGF1RK reveals how the enzyme recognizes peptides containing hydrophobic residues at the P+1 and P+3 positions and how autophosphorylation stabilizes the activation loop in a conformation that facilitates catalysis. Although the nucleotide binding cleft is conserved between IGF1RK and the insulin receptor kinase, sequence differences in the nearby interlobe linker could potentially be exploited for anticancer drug design.
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The line below this paragraph, {{ABSTRACT_PUBMED_11694888}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 11694888 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11694888}}
==About this Structure==
==About this Structure==
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[[Category: Tyrosine kinase]]
[[Category: Tyrosine kinase]]
[[Category: Tyrosine phosphorylation]]
[[Category: Tyrosine phosphorylation]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 22:14:46 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 07:17:38 2008''

Revision as of 04:17, 28 July 2008

Image:1k3a.png

Template:STRUCTURE 1k3a

Structure of the Insulin-like Growth Factor 1 Receptor Kinase

Template:ABSTRACT PUBMED 11694888

About this Structure

1K3A is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structure and autoregulation of the insulin-like growth factor 1 receptor kinase., Favelyukis S, Till JH, Hubbard SR, Miller WT, Nat Struct Biol. 2001 Dec;8(12):1058-63. PMID:11694888

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