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1jh4
From Proteopedia
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'''Solution structure of the C-terminal PABC domain of human poly(A)-binding protein in complex with the peptide from Paip1''' | '''Solution structure of the C-terminal PABC domain of human poly(A)-binding protein in complex with the peptide from Paip1''' | ||
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[[Category: Kozlov, G.]] | [[Category: Kozlov, G.]] | ||
[[Category: Siddiqui, N.]] | [[Category: Siddiqui, N.]] | ||
| - | [[Category: | + | [[Category: All-helical domain]] |
| - | [[Category: | + | [[Category: Protein-peptide complex]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 21:12:51 2008'' | |
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Revision as of 18:12, 2 May 2008
Solution structure of the C-terminal PABC domain of human poly(A)-binding protein in complex with the peptide from Paip1
Overview
The C-terminal domain of poly(A)-binding protein (PABC) is a peptide-binding domain found in poly(A)-binding proteins (PABPs) and a HECT (homologous to E6-AP C-terminus) family E3 ubiquitin ligase. In protein synthesis, the PABC domain of PABP functions to recruit several translation factors possessing the PABP-interacting motif 2 (PAM2) to the mRNA poly(A) tail. We have determined the solution structure of the human PABC domain in complex with two peptides from PABP-interacting protein-1 (Paip1) and Paip2. The structures show a novel mode of peptide recognition, in which the peptide binds as a pair of beta-turns with extensive hydrophobic, electrostatic and aromatic stacking interactions. Mutagenesis of PABC and peptide residues was used to identify key protein-peptide interactions and quantified by isothermal calorimetry, surface plasmon resonance and GST pull-down assays. The results provide insight into the specificity of PABC in mediating PABP-protein interactions.
About this Structure
1JH4 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural basis of ligand recognition by PABC, a highly specific peptide-binding domain found in poly(A)-binding protein and a HECT ubiquitin ligase., Kozlov G, De Crescenzo G, Lim NS, Siddiqui N, Fantus D, Kahvejian A, Trempe JF, Elias D, Ekiel I, Sonenberg N, O'Connor-McCourt M, Gehring K, EMBO J. 2004 Jan 28;23(2):272-81. Epub 2003 Dec 18. PMID:14685257 Page seeded by OCA on Fri May 2 21:12:51 2008
