1ihb
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= P18-INK4C(INK6) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= P18-INK4C(INK6) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ihb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ihb OCA], [http://www.ebi.ac.uk/pdbsum/1ihb PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1ihb RCSB]</span> | ||
}} | }} | ||
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[[Category: p18-ink4c(ink6)]] | [[Category: p18-ink4c(ink6)]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:19:49 2008'' |
Revision as of 18:19, 30 March 2008
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| , resolution 1.95Å | |||||||
|---|---|---|---|---|---|---|---|
| Gene: | P18-INK4C(INK6) (Homo sapiens) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF P18-INK4C(INK6)
Overview
p18INK4c is a member of a family of INK4 proteins that function to arrest the G1 to S cell cycle transition by inhibiting the activity of the cyclin-dependent kinases 4 and 6. The X-ray crystal structure of the human p18INK4c protein to a resolution of 1.95 A reveals an elongated molecule comprised of five contiguous 32- or 33-residue ankyrin-like repeat units. Each ankyrin-like repeat contains a beta-strand helix-turn-helix extended strand beta-strand motif that associates with neighboring motifs through beta-sheet, and helical bundle interactions. Conserved ankyrin-like repeat residues function to facilitate the ankyrin repeat fold and the tertiary interactions between neighboring repeat units. A large percentage of residues that are conserved among INK4 proteins and that map to positions of tumor-derived p16INK4 mutations play important roles in protein stability. A subset of these residues suggest an INK4 binding surface for the cyclin-dependent kinases 4 and 6. This surface is centered around a region that shows structural features uncharacteristic of ankyrin-like repeat units.
About this Structure
1IHB is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of the CDK4/6 inhibitory protein p18INK4c provides insights into ankyrin-like repeat structure/function and tumor-derived p16INK4 mutations., Venkataramani R, Swaminathan K, Marmorstein R, Nat Struct Biol. 1998 Jan;5(1):74-81. PMID:9437433
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