The crystal structure and mutational analysis of a novel RNA-binding domain found in the human Tap nuclear mRNA export factor

Dona N. Ho, Glen A. Coburn, Yibin Kang, Bryan R. Cullen, Millie Georgiadis

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The Tap protein mediates the sequence nonspecific nuclear export of cellular mRNAs as well as the sequence-specific export of retroviral mRNAs bearing the constitutive transport element (CTE). Previously, the structures of individual Tap subdomains, including ribonucleoprotein and leucine-rich repeat domains, have been described. Here, we report the crystal structure of a functional CTE RNA-binding domain of human Tap, including the N-terminal arm of the ribonucleoprotein domain and interdomain linking polypeptide. To identify residues that interact with the CTE, we have introduced 38 alanine substitutions for surface residues in the Tap CTE-binding domain and tested these mutants for their ability to support CTE-dependent nuclear RNA export and CTE binding. Four residues that cluster on a concave surface in the leucine-rich repeat domain were found to be critical for CTE binding and define a CTE-interacting surface on this domain. The second critical CTE-interacting surface on Tap is defined by three previously identified residues on the surface of the ribonucleoprotein domain. The structural and mutational data define a novel RNA-binding site on the Tap protein.

Original languageEnglish (US)
Pages (from-to)1888-1893
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume99
Issue number4
DOIs
StatePublished - Feb 19 2002
Externally publishedYes

Fingerprint

Cell Nucleus Active Transport
Leucine
Nuclear RNA
Messenger RNA
Ribonucleoproteins
Alanine
Proteins
Binding Sites
RNA
Peptides
RNA Recognition Motif
RNA-Binding Motifs

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

The crystal structure and mutational analysis of a novel RNA-binding domain found in the human Tap nuclear mRNA export factor. / Ho, Dona N.; Coburn, Glen A.; Kang, Yibin; Cullen, Bryan R.; Georgiadis, Millie.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 99, No. 4, 19.02.2002, p. 1888-1893.

Research output: Contribution to journalArticle

@article{c8401761360c4652bfbafd0b833ce670,
title = "The crystal structure and mutational analysis of a novel RNA-binding domain found in the human Tap nuclear mRNA export factor",
abstract = "The Tap protein mediates the sequence nonspecific nuclear export of cellular mRNAs as well as the sequence-specific export of retroviral mRNAs bearing the constitutive transport element (CTE). Previously, the structures of individual Tap subdomains, including ribonucleoprotein and leucine-rich repeat domains, have been described. Here, we report the crystal structure of a functional CTE RNA-binding domain of human Tap, including the N-terminal arm of the ribonucleoprotein domain and interdomain linking polypeptide. To identify residues that interact with the CTE, we have introduced 38 alanine substitutions for surface residues in the Tap CTE-binding domain and tested these mutants for their ability to support CTE-dependent nuclear RNA export and CTE binding. Four residues that cluster on a concave surface in the leucine-rich repeat domain were found to be critical for CTE binding and define a CTE-interacting surface on this domain. The second critical CTE-interacting surface on Tap is defined by three previously identified residues on the surface of the ribonucleoprotein domain. The structural and mutational data define a novel RNA-binding site on the Tap protein.",
author = "Ho, {Dona N.} and Coburn, {Glen A.} and Yibin Kang and Cullen, {Bryan R.} and Millie Georgiadis",
year = "2002",
month = "2",
day = "19",
doi = "10.1073/pnas.042698599",
language = "English (US)",
volume = "99",
pages = "1888--1893",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
number = "4",

}

TY - JOUR

T1 - The crystal structure and mutational analysis of a novel RNA-binding domain found in the human Tap nuclear mRNA export factor

AU - Ho, Dona N.

AU - Coburn, Glen A.

AU - Kang, Yibin

AU - Cullen, Bryan R.

AU - Georgiadis, Millie

PY - 2002/2/19

Y1 - 2002/2/19

N2 - The Tap protein mediates the sequence nonspecific nuclear export of cellular mRNAs as well as the sequence-specific export of retroviral mRNAs bearing the constitutive transport element (CTE). Previously, the structures of individual Tap subdomains, including ribonucleoprotein and leucine-rich repeat domains, have been described. Here, we report the crystal structure of a functional CTE RNA-binding domain of human Tap, including the N-terminal arm of the ribonucleoprotein domain and interdomain linking polypeptide. To identify residues that interact with the CTE, we have introduced 38 alanine substitutions for surface residues in the Tap CTE-binding domain and tested these mutants for their ability to support CTE-dependent nuclear RNA export and CTE binding. Four residues that cluster on a concave surface in the leucine-rich repeat domain were found to be critical for CTE binding and define a CTE-interacting surface on this domain. The second critical CTE-interacting surface on Tap is defined by three previously identified residues on the surface of the ribonucleoprotein domain. The structural and mutational data define a novel RNA-binding site on the Tap protein.

AB - The Tap protein mediates the sequence nonspecific nuclear export of cellular mRNAs as well as the sequence-specific export of retroviral mRNAs bearing the constitutive transport element (CTE). Previously, the structures of individual Tap subdomains, including ribonucleoprotein and leucine-rich repeat domains, have been described. Here, we report the crystal structure of a functional CTE RNA-binding domain of human Tap, including the N-terminal arm of the ribonucleoprotein domain and interdomain linking polypeptide. To identify residues that interact with the CTE, we have introduced 38 alanine substitutions for surface residues in the Tap CTE-binding domain and tested these mutants for their ability to support CTE-dependent nuclear RNA export and CTE binding. Four residues that cluster on a concave surface in the leucine-rich repeat domain were found to be critical for CTE binding and define a CTE-interacting surface on this domain. The second critical CTE-interacting surface on Tap is defined by three previously identified residues on the surface of the ribonucleoprotein domain. The structural and mutational data define a novel RNA-binding site on the Tap protein.

UR - http://www.scopus.com/inward/record.url?scp=0037133188&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037133188&partnerID=8YFLogxK

U2 - 10.1073/pnas.042698599

DO - 10.1073/pnas.042698599

M3 - Article

VL - 99

SP - 1888

EP - 1893

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 4

ER -