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洪都拉斯白蝙蝠(艾氏白蝠,Ectophylla alba)(艾伦,1982年)(翼手目:叶口蝠科)的完整线粒体基因组。

The complete mitochondrial genome of the Honduran white bat Ectophylla alba (Allen 1982) (Chiroptera: Phyllostomidae).

作者信息

Vivas-Toro Isabela, Ortega Jorge, Baeza J Antonio

机构信息

Laboratorio de Bioconservación y Manejo, Posgrado en Ciencias Quimicobiológicas, Departamento de Zoologia, Escuela Nacional de Ciencias Biologicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Col. Sto. Tomas, 11340 CDMX, Mexico.

Department of Biological Sciences, 132 Long Hall, Clemson University, Clemson, SC 29634, USA; Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, FL 34949, USA; Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile.

出版信息

Gene. 2021 Nov 15;802:145868. doi: 10.1016/j.gene.2021.145868. Epub 2021 Aug 5.

Abstract

The Honduran white bat, Ectophylla alba (Allen 1982), is one of eight species belonging to the family Phyllostomidae that exclusively roosts in tents. Due to its restricted distribution, habitat specificity, and diet requirements, E. alba has been strongly affected by habitat loss and fragmentation during the last decade. In this study, we developed the first genomic resource for this species; we assembled and analyzed in detail the complete mitochondrial genome of E. alba. The mitogenome of E. alba is 16,664 bp in length and is comprised of 13 protein coding genes (PCGs), 2 ribosomal RNA genes, 22 transfer RNA genes (tRNAs), and a putative Control Region (CR) 1,232 bp in length. Gene arrangement in the mitochondrial chromosome of E. alba is identical to that reported before in other species of co-familiar bats. All PCGs are under purifying selection, with atp8 experiencing the least selective pressure. In all PCGs, codons ending with adenine are preferred over others ending in thymine and cytosine. Except tRNA-Serine 1, all tRNAs exhibit a cloverleaf secondary structure. The CR of E. alba exhibits three domains commonly described in other mammals, including bats; extended terminal associated sequences (ETAS), central, and conserved sequence block (CSB). A ML phylogenetic reconstruction of the family Phyllostomidae based on all 13 mitochondrial PCGs confirms the monophyletic status of the subfamily Sternodermatinae and indicates the close relationship between E. alba and the genus Artibeus. This is the first genomic resource developed for E. alba and represents the first step to improving our understanding of the genomic underpinnings involved in the evolution of specialization as well as acclimatization and adaptation to local and global change of specialist bats.

摘要

洪都拉斯白蝠(Ectophylla alba,艾伦,1982年)是叶口蝠科八个物种之一,它只栖息在帐篷状的栖息处。由于其分布受限、栖息地特异性和饮食需求,在过去十年中,洪都拉斯白蝠受到栖息地丧失和破碎化的严重影响。在本研究中,我们为该物种开发了首个基因组资源;我们组装并详细分析了洪都拉斯白蝠的完整线粒体基因组。洪都拉斯白蝠的线粒体基因组长度为16,664 bp,由13个蛋白质编码基因(PCGs)、2个核糖体RNA基因、22个转运RNA基因(tRNAs)和一个长度为1,232 bp的假定控制区(CR)组成。洪都拉斯白蝠线粒体染色体中的基因排列与之前报道的其他同科蝙蝠物种相同。所有PCGs都受到纯化选择,其中atp8经历的选择压力最小。在所有PCGs中,以腺嘌呤结尾的密码子比以胸腺嘧啶和胞嘧啶结尾的密码子更受青睐。除了tRNA-丝氨酸1外,所有tRNAs都呈现出三叶草二级结构。洪都拉斯白蝠的CR呈现出其他哺乳动物(包括蝙蝠)中常见的三个结构域,即延伸末端相关序列(ETAS)、中央结构域和保守序列块(CSB)。基于所有13个线粒体PCGs对叶口蝠科进行的最大似然系统发育重建证实了叶鼻蝠亚科的单系地位,并表明洪都拉斯白蝠与美洲果蝠属之间存在密切关系。这是为洪都拉斯白蝠开发的首个基因组资源,代表了提高我们对参与特化进化以及适应和适应当地和全球变化的特化蝙蝠基因组基础理解的第一步。

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