PMID- 10518933 OWN - NLM STAT- MEDLINE DCOM- 19991028 LR - 20190621 IS - 0014-5793 (Print) IS - 0014-5793 (Linking) VI - 458 IP - 1 DP - 1999 Sep 10 TI - The delta subunit of rod specific cyclic GMP phosphodiesterase, PDE delta, interacts with the Arf-like protein Arl3 in a GTP specific manner. PG - 55-9 AB - Recently, we have shown that the delta subunit of the cGMP phosphodiesterase (PDE delta) interacts with the retinitis pigmentosa guanine regulator (RPGR). Here, using the two-hybrid system, we identify a member of the Arf-like protein family of Ras-related GTP-binding proteins, Arl3, that interacts with PDE delta. The interaction was verified by fluorescence spectroscopy and co-immunoprecipitation. Arl3 features an unusually low affinity for guanine nucleotides, with a KD of 24 nM for GDP and 48 microM for GTP. Fluorescence spectroscopy shows that PDE delta binds and specifically stabilizes the GTP-bound form of Arl3 by strongly decreasing the dissociation rate of GTP. Thus, PDE delta is an effector of Arl3 and could provide a novel nucleotide exchange mechanism by which PDE delta stabilizes Arl3 in its active GTP-bound form. FAU - Linari, M AU - Linari M AD - Max-Planck-Institut fur Molekulare Physiologie, Abteilung Strukturelle Biologie, Dortmund, Germany. FAU - Hanzal-Bayer, M AU - Hanzal-Bayer M FAU - Becker, J AU - Becker J LA - eng SI - GENBANK/AF143241 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (Eye Proteins) RN - 86-01-1 (Guanosine Triphosphate) RN - EC 3.1.4.35 (3',5'-Cyclic-GMP Phosphodiesterases) RN - EC 3.1.4.35 (Cyclic Nucleotide Phosphodiesterases, Type 6) RN - EC 3.1.4.35 (PDE6B protein, human) RN - EC 3.1.4.35 (Pde6b protein, mouse) RN - EC 3.6.1.2 (Arl3 protein, mouse) RN - EC 3.6.5.2 (ADP-Ribosylation Factors) RN - EC 3.6.5.2 (ARL3 protein, human) SB - IM MH - 3',5'-Cyclic-GMP Phosphodiesterases/*metabolism/*physiology MH - ADP-Ribosylation Factors/*metabolism MH - Animals MH - Cell Line MH - Cyclic Nucleotide Phosphodiesterases, Type 6 MH - Eye Proteins/*metabolism/*physiology MH - Guanosine Triphosphate/metabolism MH - Humans MH - Kinetics MH - Mice MH - Mutagenesis MH - Plasmids MH - Protein Conformation MH - Spectrometry, Fluorescence MH - Time Factors MH - Transfection MH - Two-Hybrid System Techniques EDAT- 1999/10/16 00:00 MHDA- 1999/10/16 00:01 CRDT- 1999/10/16 00:00 PHST- 1999/10/16 00:00 [pubmed] PHST- 1999/10/16 00:01 [medline] PHST- 1999/10/16 00:00 [entrez] AID - S0014-5793(99)01117-5 [pii] AID - 10.1016/s0014-5793(99)01117-5 [doi] PST - ppublish SO - FEBS Lett. 1999 Sep 10;458(1):55-9. doi: 10.1016/s0014-5793(99)01117-5.