PMID: 9182989May 1, 1997Paper

Human ribosomal protein L7 binds RNA with an alpha-helical arginine-rich and lysine-rich domain

European Journal of Biochemistry
P HemmerichU Krawinkel

Abstract

In this study we mapped the RNA-binding domain of human ribosomal protein L7 and characterized its conformation-dependent RNA-binding specificity. Binding competition assays demonstrated preferential binding of L7 to mRNAs and rRNA, but not to tRNA. The ribohomopolymer poly(G) is bound with high affinity whereas poly(U), poly(C), or poly(A) show low affinity to L7. Furthermore, L7 binds to double-stranded but not to single-stranded DNA. Deletion mapping showed that the RNA-binding domain of L7 is represented by an arginine-rich and lysine-rich oligopeptide (ELKIKRLRKKFAQKMLRKARRK), which is reminiscent of the arginine-rich motif (ARM) found in one family of RNA-binding proteins. The isolated RNA-binding domain is capable of high-affinity binding to the Rev-responsive element (RRE) of human immunodeficiency virus type 1 in vitro. Circular dichroic studies demonstrated a concentration-dependent and ligand-induced alpha-helical transition of a synthetic peptide carrying the arginine-lysine-rich RNA-binding domain of protein L7. Peptides carrying a mutation that destroys the alpha-helical conformation do not bind RNA.

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Citations

Mar 26, 1998·Journal of Cellular Biochemistry·Y Berghöfer-HochheimerT Munder
Nov 30, 2005·RNA·Travis S BayerAndrew D Ellington
Mar 9, 1999·International Immunology·J DonauerU Krawinkel
Sep 8, 2007·Developmental Neurobiology·Kelli A Duncan, Laura L Carruth
Aug 29, 1997·The Journal of Biological Chemistry·S Witte, U Krawinkel
Dec 23, 2016·Molecular and Cellular Biochemistry·Akhil VarshneyPramod K Yadava
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May 18, 1999·Biochemical and Biophysical Research Communications·A von MikeczP Hemmerich
Feb 4, 2014·Biochemistry·Jessica L SpearsPaul F Agris
Oct 29, 2021·Biophysical Journal·Lev Levintov, Harish Vashisth

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