Structural and Functional Analysis of FLAG Tagged-Subunit 8 of Yeast Saccharomyces Cerevisiae Mitochondrial ATP Synthase  

Oleh:

Artika, I Made

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: Microbiology Indonesia vol. 01 no. 01 (Apr. 2007), page 33-36.
Topik: Allotopic Expression; ATP Synthase; Mitochondria; Yeast
Fulltext: I Made Artika.pdf (750.47KB)

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM78.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada	Lihat Detail Induk
Perpustakaan FK Nomor Panggil: M53.K Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada	Lihat Detail Induk

Isi artikel

Yeast mitochondrial ATP synthase is a multisubunit complex composed of at least 17 different subunits. Subunit 8 of yeast mitochondrial ATP synthase is a hydrophobic protein of 48 amino acids encoded by the mitochondrial ATP8 gene. Although ATP synthase from eukaryotes and prokaryotes shows a similar basic structure, no homologue of subunit 8 is found in prokaryotes such as Escherichia coli. Subunit 8 has three distinct domains; an N-terminal domain, a central hydrophobic domain and a C-terminal domain. In order to elucidate its structure and function, a set of nuclear genes encoding subunit 8 variants was designed to incorporate a FLAG tag at the C-terminus and a mitochondrial signal peptide at the N-terminus. Each gene was cloned into a yeast expression vector and then allotopically expressed In a yeast strain lacking endogenous subunit 8. Structural and functional analysis showed that the hydrophobic character of the central hydrophobic domain of subunit 8 is critical for the ATP synthase function. Subunit 8 is sensitive to charge manipulation at the C-terminus. The positively charged residues at the C-terminal domain are important for subunit 8 assembly and hence its function.

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