Publication Cover
Mitochondrial DNA Part A
DNA Mapping, Sequencing, and Analysis
Volume 29, 2018 - Issue 2
804
Views
6
CrossRef citations to date
0
Altmetric
Research Article

Functional, structural, and phylogenetic analysis of mitochondrial cytochrome b (cytb) in insects

&
Pages 236-249 | Received 24 Sep 2016, Accepted 19 Dec 2016, Published online: 24 Jan 2017
 

Abstract

Cytochrome b (Cytb, EC 1.10. 2.2) is the only cytochrome coded by mitochondrial DNA and involved in electron transport in the mitochondrial respiratory chain. In this study, characterization of cytb protein was identified on fifty-four insect protein sequences, from different orders. According to the conserved motifs obtained with MEME and MAST tools, eight motifs were common to all insects. The structural and functional analyses of 16 selected insects from different orders were performed with ProtParam, Compute PI, SOPMA, SignalP 4.1, TMHMM 2.0, ProtScale and ProDom tools in the ExPASy database and DNASTAR 12.1 software. The tertiary structure of Drosophila melanogaster as a sample of insects was predicted by the Phyre2 and TM-score servers and their similarities were verified by SuperPose servers. The tertiary structures were predicted using the ‘d1ppjc2’ model (PDB accession code: 1ppj C). A phylogenetic tree was constructed with MEGA 6.06 software using the neighbour-joining method. According to the results, there is a high identity of cytb in different insects so that they should be derived from a common ancestor. In protein–protein interaction analysis with STRING 10.0, twenty-three enriched pathways of KEGG were identified in D. melanogaster and other species. The obtained data provided a background for bioinformatic studies of the function and evolution of other insects and organisms.

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.