PMID- 10207077 OWN - NLM STAT- MEDLINE DCOM- 19990518 LR - 20210526 IS - 0270-7306 (Print) IS - 0270-7306 (Linking) VI - 19 IP - 5 DP - 1999 May TI - The carboxyl terminus of RNA helicase A contains a bidirectional nuclear transport domain. PG - 3540-50 AB - Human RNA helicase A was recently identified to be a shuttle protein which interacts with the constitutive transport element (CTE) of type D retroviruses. Here we show that a domain of 110 amino acids at the carboxyl terminus of helicase A is both necessary and sufficient for nuclear localization as well as rapid nuclear export of glutathione S-transferase fusion proteins. The import and export activities of this domain overlap but are separable by point mutations. This bidirectional nuclear transport domain (NTD) has no obvious sequence homology to previously identified nuclear import or export signals. However, the Ran-dependent nuclear import of NTD was efficiently competed by excess amounts of the nuclear localization signal (NLS) peptide from simian virus 40 large T antigen, suggesting that import is mediated by the classical NLS pathway. The nuclear export pathway accessed by NTD is insensitive to leptomycin B and thus is distinct from the leucine-rich nuclear export signal pathway mediated by CRM1. FAU - Tang, H AU - Tang H AD - Department of Biology and Department of Medicine, University of California, San Diego, CA, USA. FAU - McDonald, D AU - McDonald D FAU - Middlesworth, T AU - Middlesworth T FAU - Hope, T J AU - Hope TJ FAU - Wong-Staal, F AU - Wong-Staal F LA - eng GR - AI35477/AI/NIAID NIH HHS/United States GR - GM56089/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Cell Biol JT - Molecular and cellular biology JID - 8109087 RN - 0 (Antigens, Polyomavirus Transforming) RN - 0 (Fatty Acids, Unsaturated) RN - 0 (Luminescent Proteins) RN - 0 (Nuclear Localization Signals) RN - 0 (Nuclear Proteins) RN - 0 (Peptide Fragments) RN - 0 (Protein Sorting Signals) RN - 0 (Recombinant Fusion Proteins) RN - 147336-22-9 (Green Fluorescent Proteins) RN - EC 3.6.4.13 (RNA Helicases) RN - EC 3.6.5.2 (ran GTP-Binding Protein) RN - Y031I2N1EO (leptomycin B) SB - IM MH - Amino Acid Sequence MH - Animals MH - Antigens, Polyomavirus Transforming/genetics MH - Biological Transport/genetics MH - Cell Line MH - Cell Nucleus/metabolism MH - Fatty Acids, Unsaturated/pharmacology MH - Green Fluorescent Proteins MH - Humans MH - Luminescent Proteins/genetics MH - Mice MH - Microscopy, Fluorescence MH - Molecular Sequence Data MH - Nuclear Localization Signals/*genetics MH - Nuclear Proteins/genetics MH - Peptide Fragments/genetics/pharmacology MH - Protein Sorting Signals/genetics MH - RNA Helicases/chemistry/*genetics MH - Recombinant Fusion Proteins/genetics MH - Sequence Deletion/genetics MH - ran GTP-Binding Protein PMC - PMC84146 EDAT- 1999/04/17 00:00 MHDA- 1999/04/17 00:01 CRDT- 1999/04/17 00:00 PHST- 1999/04/17 00:00 [pubmed] PHST- 1999/04/17 00:01 [medline] PHST- 1999/04/17 00:00 [entrez] AID - 10.1128/MCB.19.5.3540 [doi] PST - ppublish SO - Mol Cell Biol. 1999 May;19(5):3540-50. doi: 10.1128/MCB.19.5.3540.