Heliothis virescens chymotrypsin is translationally controlled by AeaTMOF binding ABC putative receptor

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Heliothis virescens larval chymotrypsin (GenBank accession number AF43709) was cloned, sequenced and its three dimensional (3D) conformation modeled. The enzyme's transcript was first detected 6 days after larval emergence and the transcript level was shown to fall between larval ecdysis periods. Comparisons between the activities of larval gut chymotrypsin and trypsin shows that chymotrypsin activity is only 16% of the total trypsin activity and the pH optimum of the larval chymotrypsin is between pH 9-10, however the enzyme also exhibited a broad activity between pH 4-6. Injections of AeaTMOF and several shorter analogues into 3rd instar larvae followed by Northern blot analyses showed that although the chymotrypsins activities were inhibited by 60%-80% the transcript level of the sequenced chymotrypsin was not reduced and was similar to controls in which the chymotrypsin activity was not inhibited, indicating that AeaTMOF and its analogues exert a translational control. Based on these observations a putative AeaTMOF receptor (ABCC4) homologous to the Ae. aegypti ABC receptor sequence was found in the H. virescens genome. 3D molecular modeling and docking of the AeaTMOF and several of its analogues to the ABCC4 receptor showed that it can bind AeaTMOF and its analogues as was shown before for the Ae. aegypti receptor.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:114

Enthalten in:

Archives of insect biochemistry and physiology - 114(2023), 2 vom: 01. Okt., Seite 1-24

Sprache:

Englisch

Beteiligte Personen:

Borovsky, Dov [VerfasserIn]
Rougé, Pierre [VerfasserIn]

Links:

Volltext

Themen:

3D modeling and docking
Chymotrypsin
Cloning and sequencing
EC 3.4.21.1
EC 3.4.21.4
Heliothis virescens
Journal Article
Larval chymotrypsin and trypsin
Northern blot analyses
Translation control
Trypsin

Anmerkungen:

Date Completed 23.10.2023

Date Revised 23.10.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1002/arch.22042

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM360260160