Role of the putative structural protein Sed1p in mitochondrial genome maintenance.

J Mol Biol

Department of Biology, University of Rochester, Rochester, NY 14627-0211, USA.

Published: September 2004

The nuclear gene MIP1 encodes the mitochondrial DNA polymerase responsible for replicating the mitochondrial genome in Saccharomyces cerevisiae. A number of other factors involved in replicating and segregating the mitochondrial genome are yet to be identified. Here, we report that a bacterial two-hybrid screen using the mitochondrial polymerase, Mip1p, as bait identified the yeast protein Sed1p. Sed1p is a cell surface protein highly expressed in the stationary phase. We find that several modified forms of Sed1p are expressed and the largest of these forms interacts with the mitochondrial polymerase in vitro. Deletion of SED1 causes a 3.5-fold increase in the rate of mitochondrial DNA point mutations as well as a 4.3-fold increase in the rate of loss of respiration. In contrast, we see no change in the rate of nuclear point mutations indicating the specific role of Sed1p function in mitochondrial genome stability. Indirect immunofluorescence analysis of Sed1p localization shows that Sed1p is targeted to the mitochondria. Moreover, Sed1p is detected in purified mitochondrial fractions and the localization to the mitochondria of the largest modified form is insensitive to the action of proteinase K. Deletion of the sed1 gene results in a reduction in the quantity of Mip1p and also affects the levels of a mitochondrially-expressed protein, Cox3p. Our results point towards a role for Sed1p in mitochondrial genome maintenance.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jmb.2004.07.096DOI Listing

Publication Analysis

Top Keywords

mitochondrial genome
20
mitochondrial
10
sed1p
9
protein sed1p
8
sed1p mitochondrial
8
genome maintenance
8
mitochondrial dna
8
mitochondrial polymerase
8
deletion sed1
8
increase rate
8

Similar Publications

The complete genome sequence of , a goldthread anthracnose pathogen, was sequenced using PacBio Revio and MGI DNBSEQ-T7 PE150. It contains 10 chromosomes, 5 mini chromosomes, a circular mitochondrial chromosome, and 13,129 genes predicted with RNA-Seq data in a 52.13-Mb genome with an of 5.

View Article and Find Full Text PDF

Background: Mitochondrial genes are involved in tumor metabolism in ovarian cancer (OC) and affect immune cell infiltration and treatment responses.

Aim: To predict prognosis and immunotherapy response in patients diagnosed with OC using mitochondrial genes and neural networks.

Methods: Prognosis, immunotherapy efficacy, and next-generation sequencing data of patients with OC were downloaded from The Cancer Genome Atlas and Gene Expression Omnibus.

View Article and Find Full Text PDF

The complete mitochondrial genomes of and .

Mitochondrial DNA B Resour

January 2025

Department of Wildlife, Fisheries and Aquaculture, Mississippi State University, Mississippi State, Mississippi, USA.

We present a novel mitogenome assembly of the Redlip Shiner, , and assemblies for the Greenhead Shiner, (Cypriniformes: Leuciscidae). Both are charismatic minnows in the taxonomic group and are endemic to the eastern United States. The genome contains 16,711bp and 16,706bp each comprising a total of 13 protein coding genes, 22 tRNAs, two rRNAs, and a control region.

View Article and Find Full Text PDF

is a popular ornamental aquatic plant for aquarists, although only six species are found in China. Destruction of the natural habitats of for human activities has led to a decline in its numbers. In this report, we sequenced and annotated the chloroplast genome for the first time.

View Article and Find Full Text PDF

The genome sequence of the tawny cockroach, Ectobius (Ectobius) pallidus (Olivier, 1789).

Wellcome Open Res

January 2025

Entomology Section, World Museum, Liverpool, England, UK.

We present a genome assembly from a specimen of (tawny cockroach; Arthropoda; Insecta; Blattodea; Ectobiidae). The assembly contains two haplotypes with total lengths of 2,087.55 megabases and 2,124.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!