Periodical
Characterization of a novel phosphatidylinositol 3-phosphate-binding protein containing two FYVE fingers in tandem that is targeted to the Golgi
| العنوان: | Characterization of a novel phosphatidylinositol 3-phosphate-binding protein containing two FYVE fingers in tandem that is targeted to the Golgi |
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| المؤلفون: | CHEUNG, Peter C. F., TRINKLE-MULCAHY, Laura, COHEN, Philip, LUCOCQ, John M. |
| المصدر: | Biochemical Journal; April 2001, Vol. 355 Issue: 1 p113-121, 9p |
| مستخلص: | We have identified a novel protein of predicted molecular mass 40kDa that contains two FYVE domains in tandem and has therefore been named TAFF1 (TAndem FYVE Fingers-1). The protein is expressed predominantly in heart and binds to PtdIns3P specifically, even though the FYVE domains in TAFF1 lacks the first Arg of the consensus sequence R(K/R)HHCR, critical for the PtdIns3P binding of other FYVE domains identified so far. The first Arg is replaced by a Thr and Ser in the N-terminal and C-terminal FYVE domains of TAFF1 respectively. Mutational analysis indicates that both FYVE domains are required for high affinity binding to PtdIns3P. Cell localization studies using a green fluorescent protein fusion show that TAFF1 is localized to the Golgi, and that the Golgi targeting sequence is located within the N-terminal 187 residues and not in either FYVE domain. The sequence of TAFF1has been deposited with the GenBank®, EMBL, DDBJ and GSDB Nucleotide Sequence Databases under accession number AF311602. |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 02646021 14708728 |
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| DOI: | 10.1042/bj3550113 |