Dataset Information

The first complete mitochondrial genome data of the Afghan pika Ochotona rufescens (Lagomorpha, Ochotonidae), near the type locality.

ABSTRACT: The Afghan pika Ochotona rufescens (Gray, 1842) is widely distributed across the mountains of Afghanistan, Iran, Pakistan, and southwestern Turkmenistan, most often at elevations between 2,000 and 3,000 m. Here we present, for the first time, the complete mitochondrial genomes of two specimens of the nominotypical subspecies Ochotona rufescens rufescens, de novo assembled from Illumina short reads of fragmented probe-enriched DNA. The lengths of the circular mitogenomes are 16,408 bp and 16,407 bp, respectively. Both mitogenomes contain 13 protein-coding genes (PCGs), two ribosomal RNAs (16S rRNA and 12S rRNA), 22 transfer RNA genes, and a control region. The gene NAD6 and the tRNA (Gln), tRNA (Ala), tRNA (Asn), tRNA (Cys), tRNA (Tyr), tRNA (Ser), tRNA (Glu), and tRNA (Pro) are encoded on the light strand while the rest are encoded on the heavy strand. The overall nucleotide composition was ∼30% for A, 25% for T, 15% for G, and 29% for C. The mitogenome data are available in the GenBank under the accession numbers ON859136 and ON859137.

SUBMITTER: Saha A

PROVIDER: S-EPMC10964060 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature

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The first complete mitochondrial genome data of the Afghan pika Ochotona rufescens (Lagomorpha, Ochotonidae), near the type locality.

Saha Anwesha A Baca Mateusz M Popović Danijela D Mohammadi Zeinolabedin Z Olsson Urban U Roycroft Emily E Fostowicz-Frelik Łucja Ł

Data in brief 20240228

The Afghan pika Ochotona rufescens (Gray, 1842) is widely distributed across the mountains of Afghanistan, Iran, Pakistan, and southwestern Turkmenistan, most often at elevations between 2,000 and 3,000 m. Here we present, for the first time, the complete mitochondrial genomes of two specimens of the nominotypical subspecies Ochotona rufescens rufescens, de novo assembled from Illumina short reads of fragmented probe-enriched DNA. The lengths of the circular mitogenomes are 16,408 ...[more]

PMID: 38533117

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Project description:Testis-specific lactate dehydrogenase (LDH-C₄) is one of the lactate dehydrogenase (LDH) isozymes that catalyze the terminal reaction of pyruvate to lactate in the glycolytic pathway. LDH-C₄ in mammals was previously thought to be expressed only in spermatozoa and testis and not in other tissues. Plateau pika (Ochotona curzoniae) belongs to the genus Ochotona of the Ochotonidea family. It is a hypoxia-tolerant species living in remote mountain areas at altitudes of 3000-5000 m above sea level on the Qinghai-Tibet Plateau. Surprisingly, Ldh-c is expressed not only in its testis and sperm, but also in somatic tissues of plateau pika. To shed light on the function of LDH-C₄ in somatic cells, Ldh-a, Ldh-b, and Ldh-c of plateau pika were subcloned into bacterial expression vectors. The pure enzymes of Lactate Dehydrogenase A₄ (LDH-A₄), Lactate Dehydrogenase B₄ (LDH-B₄), and LDH-C₄ were prepared by a series of expression and purification processes, and the three enzymes were identified by the method of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and native polyacrylamide gel electrophoresis (PAGE). The enzymatic kinetics properties of these enzymes were studied by Lineweaver-Burk double-reciprocal plots. The results showed the Michaelis constant (Km) of LDH-C₄ for pyruvate and lactate was 0.052 and 4.934 mmol/L, respectively, with an approximate 90 times higher affinity of LDH-C₄ for pyruvate than for lactate. At relatively high concentrations of lactate, the inhibition constant (Ki) of the LDH isoenzymes varied: LDH-A₄ (Ki = 26.900 mmol/L), LDH-B₄ (Ki = 23.800 mmol/L), and LDH-C₄ (Ki = 65.500 mmol/L). These data suggest that inhibition of lactate by LDH-A₄ and LDH-B₄ were stronger than LDH-C₄. In light of the enzymatic kinetics properties, we suggest that the plateau pika can reduce reliance on oxygen supply and enhance its adaptation to the hypoxic environments due to increased anaerobic glycolysis by LDH-C₄.

Dataset Information

The first complete mitochondrial genome data of the Afghan pika Ochotona rufescens (Lagomorpha, Ochotonidae), near the type locality.

Publications

The first complete mitochondrial genome data of the Afghan pika <i>Ochotona rufescens</i> (Lagomorpha, Ochotonidae), near the type locality.

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