PMID- 22683441 OWN - NLM STAT- MEDLINE DCOM- 20121129 LR - 20211021 IS - 1879-0240 (Electronic) IS - 0965-1748 (Print) IS - 0965-1748 (Linking) VI - 42 IP - 9 DP - 2012 Sep TI - Identification and characterization of two chitin synthase genes in African malaria mosquito, Anopheles gambiae. PG - 674-82 LID - 10.1016/j.ibmb.2012.05.005 [doi] AB - Chitin synthase (CHS) represents an attractive target site for combating insect pests as insect growth and development are strictly dependent on precisely tuned chitin biosynthesis and this pathway is absent in humans and other vertebrates. Current knowledge on CHS in insects, especially their structures, functions, and regulations is still very limited. We report the identification and characterization of two chitin synthase genes, AgCHS1 and AgCHS2, in African malaria mosquito, Anopheles gambiae. AgCHS1 and AgCHS2 were predicted to encode proteins of 1,578 and 1,586 amino acid residues, respectively. Their deduced amino acid sequences show high similarities to other insect chitin synthases. Transcriptional analysis indicated that AgCHS1 was expressed in egg, larval, pupal and adult stages whereas AgCHS2 appeared to be expressed at relatively low levels, particularly during the larval stages as examined by reverse transcription (RT)-PCR and real-time quantitative PCR. Relatively high expression was detected in the carcass followed by the foregut and hindgut for AgCHS1, and the foregut (cardia included) followed by the midgut for AgCHS2. Fluorescence in situ hybridization (FISH) and immunohistochemical analysis revealed new information including the localization of the two enzymes in the ommatidia of the compound eyes, and AgCHS2 in the thoracic and abdominal inter-segmental regions of pupal integument. CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved. FAU - Zhang, Xin AU - Zhang X AD - Department of Entomology, 123 Waters Hall, Kansas State University, Manhattan, KS 66506, USA. FAU - Zhang, Jianzhen AU - Zhang J FAU - Park, Yoonseong AU - Park Y FAU - Zhu, Kun Yan AU - Zhu KY LA - eng GR - P20 RR016475/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20120607 PL - England TA - Insect Biochem Mol Biol JT - Insect biochemistry and molecular biology JID - 9207282 RN - 0 (Insect Proteins) RN - EC 2.4.1.16 (Chitin Synthase) SB - IM MH - Amino Acid Sequence MH - Animals MH - Anopheles/enzymology/*genetics MH - Chitin Synthase/*genetics/metabolism MH - Female MH - Gene Expression MH - In Situ Hybridization, Fluorescence MH - Insect Proteins/*genetics/metabolism MH - Molecular Sequence Data MH - Sequence Analysis, DNA MH - Sequence Analysis, Protein PMC - PMC3489263 MID - NIHMS384629 EDAT- 2012/06/12 06:00 MHDA- 2012/12/10 06:00 PMCR- 2013/09/01 CRDT- 2012/06/12 06:00 PHST- 2011/12/29 00:00 [received] PHST- 2012/05/07 00:00 [revised] PHST- 2012/05/13 00:00 [accepted] PHST- 2012/06/12 06:00 [entrez] PHST- 2012/06/12 06:00 [pubmed] PHST- 2012/12/10 06:00 [medline] PHST- 2013/09/01 00:00 [pmc-release] AID - S0965-1748(12)00076-8 [pii] AID - 10.1016/j.ibmb.2012.05.005 [doi] PST - ppublish SO - Insect Biochem Mol Biol. 2012 Sep;42(9):674-82. doi: 10.1016/j.ibmb.2012.05.005. Epub 2012 Jun 7.