Abstract：
:In this report, we describe the glutathione transferase (GST) gene family in the dengue vector Aedes aegypti and suggest a novel role for a new class of mosquito GSTs. Twenty-six GST genes are present in Ae. aegypti, two of which are alternatively spliced to give a total of 29 transcripts for cytosolic GSTs. The six classes identified in other insect species are all represented and, as in Anopheles gambiae, the majority of the mosquito GSTs belong to the insect-specific Delta and Epsilon classes with eight members each. Sixteen secure 1:1 orthologs were identified between GSTs in Ae. aegypti and An. gambiae, but only four of these have recognisable orthologs in Drosophila melanogaster. Three mosquito-specific GSTs were identified which did not belong to any previously recognised GST classes. One of these, GSTx2, has been previously implicated in conferring 1,1,1-trichloro-2,2-bis-(p-chlorophenyl)ethane (DDT) resistance in Ae. aegypti from South America. However, we found no evidence for increased levels of this GST protein in DDT/pyrethroid-resistant populations from Thailand. Furthermore, we show that the recombinant GSTX2-2 protein is unable to metabolise DDT. Interestingly, GSTX2-2 showed an affinity for hematin, and this, together with the restricted distribution of this class to haematophagous insects, may indicate a role for these enzymes in protecting mosquitoes against heme toxicity during blood feeding.
journal_name
Insect Biochem Mol Bioljournal_title
Insect biochemistry and molecular biologyauthors
Lumjuan N,Stevenson BJ,Prapanthadara LA,Somboon P,Brophy PM,Loftus BJ,Severson DW,Ranson Hdoi
10.1016/j.ibmb.2007.05.018subject
Has Abstractpub_date
2007-10-01 00:00:00pages
1026-35issue
10eissn
0965-1748issn
1879-0240pii
S0965-1748(07)00126-9journal_volume
37pub_type
杂志文章abstract：:Termites express polyphenism during caste differentiation that is mostly undefined at the molecular level. Using the eastern subterranean termite, Reticulitermes flavipes Kollar, we wanted (1) to test juvenile hormone (JH) model assays for their ability to induce detectable molecular changes in worker termites and (2)...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2004.12.001
更新日期：2005-03-01 00:00:00
abstract：:The short days of late summer and early fall are the environmental cues that most temperate insects and other animals use to predict winter's arrival. Although it is still unclear precisely how insects measure daylength, there is mounting evidence that the circadian clock regulates seasonal responses including photope...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2020.103365
更新日期：2020-06-01 00:00:00
abstract：:In mosquitoes, yolk protein precursor (YPP) gene expression is activated after a blood meal through the synergistic action of a steroid hormone and the amino acid/target of rapamycin (TOR) signaling pathway in the fat body. We investigated the role of insulin signaling in the regulation of YPP gene expression. The pre...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2007.08.004
更新日期：2007-12-01 00:00:00
abstract：:Many insect developmental color changes are known to be regulated by both ecdysone and juvenile hormone. Yet the molecular mechanisms underlying this regulation have not been well understood. This review highlights the hormonal mechanisms involved in the regulation of two key enzymes [dopa decarboxylase (DDC) and phen...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章,评审
doi：10.1016/j.ibmb.2009.01.008
更新日期：2009-04-01 00:00:00
abstract：:To analyze cecropin B promoter (P-CecB) activity in vivo, we constructed transgenic silkworms that expressed EGFP under the control of P-CecB using the piggyBac transposable element. Genomic Southern blot analysis of the G1 and G2 generations indicated the stable insertion of EGFP in the genome. Injection of Escherich...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2006.03.002
更新日期：2006-05-01 00:00:00
abstract：:In silico docking analysis reported here suggests that insect cellular cytoskeletal beta-actin could be the target of Azadirachtin A (Aza-the principle bioactive compound of neem seeds). The best docking energy of -40.09 kcal/mol at 8.73 A RMSD and predicted hydrogen bond between Arg210 and carboxymethyl group of Aza ...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2007.03.010
更新日期：2007-06-01 00:00:00
abstract：:DNA methylation is an important epigenetic mechanism involved in gene expression of vertebrates and invertebrates. In general, DNA methylation profile is established by de novo DNA methyltransferases (DNMT-3A, -3B) and maintainance DNA methyltransferase (DNMT-1). DNMT-1 has a strong substrate preference for hemimethyl...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2015.01.008
更新日期：2015-03-01 00:00:00
abstract：:As a component of the mediator complex, the intersex (ix) gene product is involved in the sex determination pathway of the Drosophila melanogaster. IX functions together with the female-specific product of doublesex (dsx) at the bottom of the hierarchy to implement female sexual differentiation. Here we analyzed the f...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2019.02.003
更新日期：2019-05-01 00:00:00
abstract：:In the silkworm Bombyx mori, three fibroin genes, fibroin-heavy-chain (fibH), fibroin-light-chain (fibL) and fibrohexamerin (fhx), are coexpressed only in the posterior silk gland (PSG) cells, while the sericin genes encoding silk glue proteins are expressed in the middle silk gland (MSG) cells. Silk gland factor-2 (S...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2014.11.003
更新日期：2015-01-01 00:00:00
abstract：:Current knowledge of sand fly salivary components has been based solely on Lutzomyia and Phlebotomus species which feed mainly on mammals; their hyaluronidases and apyrases were demonstrated to significantly affect blood meal intake and transmission of vector-borne pathogens. Members of the third sand fly genus Sergen...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2018.09.010
更新日期：2018-11-01 00:00:00
abstract：:In the Apis mellifera post-genomic era, RNAi protocols have been used in functional approaches. However, sample manipulation and invasive methods such as injection of double-stranded RNA (dsRNA) can compromise physiology and survival. To circumvent these problems, we developed a non-invasive method for honeybee gene k...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2008.10.011
更新日期：2009-02-01 00:00:00
abstract：:The biosynthesis of insect juvenile hormone (JH) and its neuroendocrine control are attractive targets for chemical control of insect pests and vectors of disease. To facilitate the molecular study of JH biosynthesis, we analyzed ESTs from the glands producing JH, the corpora allata (CA) in the cockroach Diploptera pu...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2006.01.013
更新日期：2006-04-01 00:00:00
abstract：:The twelve sequenced Drosophila genomes show the vast majority of neurohormone and neuropeptide genes to be very well conserved. Nonetheless, the gene encoding the hormone neuroparsin has undergone significant evolution. Although Drosophila melanogaster has one of the best known genomes, no neuroparsin gene can be det...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2010.03.001
更新日期：2010-04-01 00:00:00
abstract：:The peach-potato aphid Myzus persicae (Sulzer) has developed resistance to pyrethroid insecticides as a result of a mechanism conferring reduced nervous system sensitivity, termed knockdown resistance (kdr). This reduced sensitivity is caused by two mutations, L1014F (kdr) and M918T (super-kdr), in the para-type volta...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2004.06.002
更新日期：2004-08-01 00:00:00
abstract：:Nutrition is vital to health and the availability of resources has long been acknowledged as a key factor in the ability to fight off parasites, as investing in the immune system is costly. Resources have typically been considered as something of a "black box", with the quantity of available food being used as a proxy...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2019.04.009
更新日期：2019-06-01 00:00:00
abstract：:This study was designed to identify one of the main components of venomous secretions of the endoparasitic wasp Asobara tabida. By using electrophoretic methods, partial amino acid sequencing and immunostaining, we demonstrated the presence of an aspartylglucosaminidase (AGA)-like protein in the venom of this insect. ...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2004.03.001
更新日期：2004-05-01 00:00:00
abstract：:We have previously shown that Rhodnius prolixus' eggs and hemolymph are pink due to the presence of the hemeprotein Rhodnius heme-binding protein (RHBP). In the hemolymph it functions as an antioxidant. Nevertheless, its function in eggs has not been determined. Here we present evidence that RHBP is a source of heme f...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/s0965-1748(01)00163-1
更新日期：2002-04-01 00:00:00
abstract：:Although many insect cell lines derived from various tissues are available, it is unclear whether endogenous receptors of Bacillus thuringiensis (Bt) crystal toxins are expressed in these cell lines. In the present study, we demonstrated that the ovaries-derived Spodoptera litura Sl-HP cell line was susceptible to act...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2015.01.014
更新日期：2015-04-01 00:00:00
abstract：:Three laminarinases (LAM, LIC 1, and LIC 2) and two cellulases (CEL 1 and CEL 2) were purified to homogeneity from Periplaneta americana midguts. These beta-glucanases are secreted by salivary glands, stabilized by calcium ions, and have pH optima around 6. LAM (46 kDa) is active only on laminarin, native or with oxid...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/s0965-1748(03)00121-8
更新日期：2003-11-01 00:00:00
abstract：:Phenol oxidase (PO) is known to play an important role in defense mechanisms in insect immunity. It is present as a zymogen in insect hemolymph, and can be activated by a specific proteolytic reaction that is stimulated by microbial cell wall components. The pro-phenol oxidase (pro-PO) purified from the larval hemolym...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/s0965-1748(97)00066-0
更新日期：1997-10-01 00:00:00
abstract：:Glutamine synthetase (GS) in the mosquito, Aedes aegypti, is induced in the midgut following a blood meal. Mosquito GS message is detected as soon as 1 h post-blood feeding and remains stable for 18 h. Using a PCR product encoding mosquito GS, a lambda gt10 adult female mosquito cDNA library was screened. A cDNA clone...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/s0965-1748(98)00073-3
更新日期：1998-12-01 00:00:00
abstract：:Voltage-gated sodium channels are essential for the generation and propagation of action potentials in most excitable cells. They are the target sites of several classes of insecticides and acaricides. Isolation of full-length sodium channel cDNA is a critical and often difficult step toward an understanding of insect...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/s0965-1748(03)00068-7
更新日期：2003-07-01 00:00:00
abstract：:The termite soldier is unique because of its defensive task in a colony. In Nasutitermitinae (family Termitidae), soldiers use in their defense frontal glands, which contain various chemical substances. To isolate the gene products related to the chemical defense, we compared the sodium dodecyl sulfate-polyacrylamide ...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2005.01.007
更新日期：2005-04-01 00:00:00
abstract：:The innate immune system of insects is divided into humoral and cellular defense responses. Humoral defenses include antimicrobial peptides, the cascades that regulate coagulation and melanization of hemolymph, and the production of reactive intermediates of oxygen and nitrogen. Cellular defenses refer to hemocyte-med...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章,评审
doi：10.1016/s0965-1748(02)00092-9
更新日期：2002-10-01 00:00:00
abstract：:Rhodnius prolixus is an obligatorily hematophagous insect known as an important vector of Chagas disease. Autophagy is a conserved cellular mechanism that acts in response to nutrient starvation, where components of the cytoplasm are sequestered by a double membrane organelle, named autophagosome, which is targeted to...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2020.103484
更新日期：2020-12-01 00:00:00
abstract：:The insect arginine vasopressin-like (AVPL) peptide is of special interest because of its potential function in the regulation of diuresis. Genome sequences of the red flour beetle Tribolium castaneum yielded the genes encoding AVPL and AVPL receptor, whereas the homologous sequences are absent in the genomes of the f...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2008.04.006
更新日期：2008-07-01 00:00:00
abstract：:Olfaction in Drosophila is mediated by a large family of membrane-bound odorant receptor proteins (Ors). In heterologous cells, we investigated whether the structural features and signalling mechanisms of ligand-binding Drosophila Ors are consistent with them being G protein-coupled receptors (GPCRs). The detailed mem...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2008.05.002
更新日期：2008-08-01 00:00:00
abstract：:Silk secreted by the larvae of Hydropsyche angustipennis (Trichoptera) contains serpins HaSerp2A and HaSerp2B that are homologous to serpin 2 known from several lepidopterans and some other insects. The gene HaSerp2A is 2684 bp downstream from the HaSerp2B gene. The genes possess identical exon/intron segmentation (9 ...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2012.01.008
更新日期：2012-05-01 00:00:00
abstract：:Diapause, an alternative developmental pathway characterized by changes in developmental timing and metabolism, is coordinated by molecular mechanisms that are not completely understood. MicroRNA (miRNA) mediated gene silencing is emerging as a key component of animal development and may have a significant role in ini...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2017.03.002
更新日期：2017-05-01 00:00:00
abstract：:There are multiple stages in the life cycle of Plasmodium that invade host cells. Molecular machinery involved is such host-pathogen interactions constitute excellent drug targets and/or vaccine candidates. A screen using a phage display library has previously demonstrated presence of enolase on the surface of the Pla...
journal_title：Insect biochemistry and molecular biology
pub_type： 杂志文章
doi：10.1016/j.ibmb.2015.11.004
更新日期：2016-01-01 00:00:00
