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An autophagosome is a spherical structure with double layer membranes. [2] It is the key structure in macroautophagy , the intracellular degradation system for cytoplasmic contents (e.g., abnormal intracellular proteins , excess or damaged organelles , invading microorganisms).
Gene structure is the organisation of specialised sequence elements within a gene. Genes contain most of the information necessary for living cells to survive and reproduce. [ 1 ] [ 2 ] In most organisms, genes are made of DNA, where the particular DNA sequence determines the function of the gene.
Using sequence databases a researcher can usually determine, with some confidence, from which original mRNA (and therefore which gene) the tag was extracted. Statistical methods can be applied to tag and count lists from different samples in order to determine which genes are more highly expressed.
[7] [8] The sequence associates with the ubiquitin- proteasome system, UPS, required for the unique development of an autophagosomal membrane and fusion within cells. [9] ATG7 was identified based on homology to yeast cells Pichia pastoris GSA7 and Saccharomyces cerevisiae APG7. The protein appears to be required for fusion of peroxisomal and ...
ATG may be part of the protein name (such as ATG7) or part of the gene name (such as ATG7), [53] although all ATG proteins and genes do not follow this pattern (such as ULK1). [ 52 ] To give specific examples, the UKL1 enzyme (kinase complex) induces autophagosome biogenesis, and ATG13 ( Autophagy-related protein 13 ) is required for phagosome ...
Conversely, decreased CMA activity associates with increased genome instability and decreased cell survival. CMA is involved in the removal of Chk1, a key protein for cell cycle progression and cells with impaired CMA have defective DNA repair. [26] CMA degrades lipid droplet proteins (perilipin 2 and perilipin 3). [27]
Sequence homology is the biological homology between DNA, RNA, or protein sequences, defined in terms of shared ancestry in the evolutionary history of life. Two segments of DNA can have shared ancestry because of three phenomena: either a speciation event (orthologs), or a duplication event (paralogs), or else a horizontal (or lateral) gene ...
Sequence similarity based methods. They consist in the identification of homologous sequences with known DNA binding sites, or by aligning them with query proteins. Their performance is usually low because the DNA binding sequences are less conserved. Structure based methods. They employ the three-dimensional structural information of proteins ...