This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
1opi
From Proteopedia
| |||||||
| Related: | 1O0P
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
SOLUTION STRUCTURE OF THE THIRD RNA RECOGNITION MOTIF (RRM) OF U2AF65 IN COMPLEX WITH AN N-TERMINAL SF1 PEPTIDE
Overview
The essential splicing factors SF1 and U2AF play an important role in the recognition of the pre-mRNA 3' splice site during early spliceosome assembly. The structure of the C-terminal RRM (RRM3) of human U2AF(65) complexed to an N-terminal peptide of SF1 reveals an extended negatively charged helix A and an additional helix C. Helix C shields the potential RNA binding surface. SF1 binds to the opposite, helical face of RRM3. It inserts a conserved tryptophan into a hydrophobic pocket between helices A and B in a way that strikingly resembles part of the molecular interface in the U2AF heterodimer. This molecular recognition establishes a paradigm for protein binding by a subfamily of noncanonical RRMs.
About this Structure
1OPI is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural basis for the molecular recognition between human splicing factors U2AF65 and SF1/mBBP., Selenko P, Gregorovic G, Sprangers R, Stier G, Rhani Z, Kramer A, Sattler M, Mol Cell. 2003 Apr;11(4):965-76. PMID:12718882
Page seeded by OCA on Sun Mar 30 22:48:31 2008
