PMID- 15548422 OWN - NLM STAT- MEDLINE DCOM- 20050106 LR - 20171116 IS - 0074-7696 (Print) IS - 0074-7696 (Linking) VI - 241 DP - 2004 TI - Insect basic leucine zipper proteins and their role in cyclic AMP-dependent regulation of gene expression. PG - 277-309 AB - The cAMP-protein kinase A (PKA) pathway is an important intracellular signal transduction cascade that can be activated by a large variety of stimuli. Activation or inhibition of this pathway will ultimately affect the transcriptional regulation of various genes through distinct responsive sites. In vertebrates, the best- characterized nuclear targets of PKA are the cyclic AMP response element-binding (CREB) proteins. It is now well established that CREB is not only regulated by PKA, but many other kinases can exert an effect as well. Since CREB-like proteins were also discovered in invertebrates, several studies unraveling their physiological functions in this category of metazoans have been performed. This review will mainly focus on the presence and regulation of CREB proteins in insects. Differences in transcriptional responses to the PKA pathway and other CREB-regulating stimuli between cells, tissues, and even organisms can be partially attributed to the presence of different CREB isoforms. In addition, the regulation of CREB appears to show some important differences between insects and vertebrates. Since CREB is a basic leucine zipper (bZip) protein, other insect members of this important family of transcriptional regulators will be briefly discussed as well. FAU - Poels, Jeroen AU - Poels J AD - Laboratory for Developmental Physiology, Genomics and Proteomics, Catholic University Leuven, B-3000 Leuven, Belgium. FAU - Vanden Broeck, Jozef AU - Vanden Broeck J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Int Rev Cytol JT - International review of cytology JID - 2985180R RN - 0 (Cyclic AMP Response Element-Binding Protein) RN - 0 (Protein Isoforms) RN - E0399OZS9N (Cyclic AMP) RN - EC 2.7.11.11 (Cyclic AMP-Dependent Protein Kinases) SB - IM MH - Animals MH - Cyclic AMP/*metabolism MH - Cyclic AMP Response Element-Binding Protein/genetics/*metabolism MH - Cyclic AMP-Dependent Protein Kinases/metabolism MH - Gene Expression Regulation/genetics/*physiology MH - Insecta/genetics/*metabolism MH - Leucine Zippers/*genetics MH - Protein Isoforms/metabolism MH - Species Specificity RF - 179 EDAT- 2004/11/19 09:00 MHDA- 2005/01/07 09:00 CRDT- 2004/11/19 09:00 PHST- 2004/11/19 09:00 [pubmed] PHST- 2005/01/07 09:00 [medline] PHST- 2004/11/19 09:00 [entrez] AID - S0074769604410055 [pii] AID - 10.1016/S0074-7696(04)41005-5 [doi] PST - ppublish SO - Int Rev Cytol. 2004;241:277-309. doi: 10.1016/S0074-7696(04)41005-5.