3BSB

Crystal Structure of Human Pumilio1 in Complex with CyclinB reverse RNA

Summary for 3BSB

• Entry DOI: 10.2210/pdb3bsb/pdb
• Related: 1M8W 1M8X 1M8Y 3BSX
• Descriptor: 5'-R(*UP*UP*UP*AP*AP*UP*GP*UP*U)-3', Pumilio homolog 1 (3 entities in total)
• Functional Keywords: protein-rna complex, alternative splicing, cytoplasm, phosphoprotein, rna-binding, translation regulation, rna binding protein-rna complex, rna binding protein/rna
• Biological source: Homo sapiens (human)
• Cellular location: Cytoplasm : Q14671
• Total number of polymer chains: 3
• Total formula weight: 82413.54

Authors

Gupta, Y.K.,Nair, D.T.,Wharton, R.P.,Aggarwal, A.K. (deposition date: 2007-12-23, release date: 2008-04-08, Last modification date: 2023-11-01)

Primary citation

Gupta, Y.K.,Nair, D.T.,Wharton, R.P.,Aggarwal, A.K.
Structures of human Pumilio with noncognate RNAs reveal molecular mechanisms for binding promiscuity.
Structure, 16:549-557, 2008

PubMed Abstract: Pumilio is a founder member of the evolutionarily conserved Puf family of RNA-binding proteins that control a number of physiological processes in eukaryotes. A structure of human Pumilio (hPum) Puf domain bound to a Drosophila regulatory sequence showed that each Puf repeat recognizes a single nucleotide. Puf domains in general bind promiscuously to a large set of degenerate sequences, but the structural basis for this promiscuity has been unclear. Here, we describe the structures of hPum Puf domain complexed to two noncognate RNAs, CycB(reverse) and Puf5. In each complex, one of the nucleotides is ejected from the binding surface, in effect, acting as a "spacer." The complexes also reveal the plasticity of several Puf repeats, which recognize noncanonical nucleotides. Together, these complexes provide a molecular basis for recognition of degenerate binding sites, which significantly increases the number of mRNAs targeted for regulation by Puf proteins in vivo.

PubMed: 18328718
DOI: 10.1016/j.str.2008.01.006

Experimental method

X-RAY DIFFRACTION (2.8 Å)