ATG7

Autophagy related 7 is a protein in humans encoded by ATG7 gene. Related to GSA7; APG7L; APG7-LIKE.

ATG7
Identifiers
Aliases	ATG7, APG7-LIKE, APG7L, GSA7, autophagy related 7, SCAR31
External IDs	OMIM: 608760; MGI: 1921494; HomoloGene: 4662; GeneCards: ATG7; OMA:ATG7 - orthologs
Gene location (Human) Chr. Chromosome 3 (human) Band 3p25.3 Start 11,272,309 bp End 11,557,665 bp
Gene location (Mouse) Chr. Chromosome 6 (mouse) Band 6|6 E3 Start 114,620,058 bp End 114,837,575 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in monocyte Achilles tendon oocyte islet of Langerhans epithelium of colon testicle granulocyte blood buccal mucosa cell rectum Top expressed in lumbar spinal ganglion granulocyte spermatocyte morula morula spermatid genital tubercle tail of embryo zygote left lobe of liver More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein homodimerization activity transcription factor binding ubiquitin activating enzyme activity protein binding ubiquitin-like modifier activating enzyme activity Atg12 activating enzyme activity Atg8 activating enzyme activity Cellular component cytoplasm axoneme extracellular region axon secretory granule lumen ficolin-1-rich granule lumen cytosol phagophore assembly site Biological process positive regulation of protein catabolic process cellular response to hyperoxia cellular response to starvation membrane fusion defense response to virus positive regulation of protein modification process positive regulation of apoptotic process protein transport protein lipidation suppression by virus of host autophagy protein ubiquitination autophagy ageing response to glucose macroautophagy response to nutrient levels neutrophil degranulation negative regulation of cell death cellular response to morphine negative regulation of mitochondrial DNA replication regulation of neuron death response to fluoride negative regulation of oxidative stress-induced neuron death autophagy of mitochondrion autophagosome assembly C-terminal protein lipidation cellular response to nitrogen starvation piecemeal microautophagy of the nucleus late nucleophagy positive regulation of autophagy regulation of circadian rhythm chaperone-mediated autophagy protein modification by small protein conjugation rhythmic process Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 10533 74244 Ensembl ENSG00000197548 ENSMUSG00000030314 UniProt O95352 Q9D906 RefSeq (mRNA) NM_001136031 NM_001144912 NM_006395 NM_001349232 NM_001349233 NM_001349234 NM_001349235 NM_001349236 NM_001349237 NM_001349238 NM_001253717 NM_001253718 NM_028835 NM_001379130 RefSeq (protein) NP_001129503 NP_001138384 NP_006386 NP_001336161 NP_001336162 NP_001336163 NP_001336164 NP_001336165 NP_001336166 NP_001336167 NP_001240646 NP_001240647 NP_083111 NP_001366059 Location (UCSC) Chr 3: 11.27 – 11.56 Mb Chr 6: 114.62 – 114.84 Mb PubMed search
Wikidata
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ATG 7, present in both plant and animal genomes, acts as an essential protein for cell degradation and its recycling. The sequence associates with the ubiquitin- proteasome system, UPS, required for the unique development of an autophagosomal membrane and fusion within cells.

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 vacuolar membranes.

Autophagy is an important cellular process that helps in maintaining homeostasis. It goes through destroying and recycling the cytoplasmic organelles and macromolecules. During the initiation of autophagy, ATG7 acts like an E-1 enzyme for ubiquitin-like proteins (UBL) such as ATG12 and ATG8. ATG7 helps these UBL proteins in targeting their molecule by binding to them and activating their transfer to an E-2 enzyme. ATG7's role in both of these autophagy-specific UBL systems makes it an essential regulator of autophagosome assembly.

Homologous to the ATP-binding and catalytic sites of E1 activator proteins, ATG7 uses its cysteine residue to create a thiol-ester bond with free Ubiquitin molecules. Through UPS, Ubiquitin will continue to bind to other autophagy-related proteins, E2 conjugation proteins and E3 protein ligases, to attach Ubiquitins to a target substrate to induce autophagy.

ATG 7 is often associated with ATG12/ ATG5 sequenced ubiquitination cascade. As well in presence of p53 cell cycle pathways during stressed and nutrient poor environments.

Further reading

• Tanida I, Tanida-Miyake E, Komatsu M, Ueno T, Kominami E (April 2002). "Human Apg3p/Aut1p homologue is an authentic E2 enzyme for multiple substrates, GATE-16, GABARAP, and MAP-LC3, and facilitates the conjugation of hApg12p to hApg5p". The Journal of Biological Chemistry. 277 (16): 13739–44. doi:10.1074/jbc.M200385200. PMID 11825910.
• Tanida I, Tanida-Miyake E, Nishitani T, Komatsu M, Yamazaki H, Ueno T, Kominami E (March 2002). "Murine Apg12p has a substrate preference for murine Apg7p over three Apg8p homologs". Biochemical and Biophysical Research Communications. 292 (1): 256–62. doi:10.1006/bbrc.2002.6645. PMID 11890701.
• Mizushima N, Yoshimori T, Ohsumi Y (December 2002). "Mouse Apg10 as an Apg12-conjugating enzyme: analysis by the conjugation-mediated yeast two-hybrid method". FEBS Letters. 532 (3): 450–4. doi:10.1016/S0014-5793(02)03739-0. PMID 12482611. S2CID 37247321.
• Nemoto T, Tanida I, Tanida-Miyake E, Minematsu-Ikeguchi N, Yokota M, Ohsumi M, Ueno T, Kominami E (October 2003). "The mouse APG10 homologue, an E2-like enzyme for Apg12p conjugation, facilitates MAP-LC3 modification". The Journal of Biological Chemistry. 278 (41): 39517–26. doi:10.1074/jbc.m300550200. PMID 12890687.
• Otsuki T, Ota T, Nishikawa T, Hayashi K, Suzuki Y, Yamamoto J, Wakamatsu A, Kimura K, Sakamoto K, Hatano N, Kawai Y, Ishii S, Saito K, Kojima S, Sugiyama T, Ono T, Okano K, Yoshikawa Y, Aotsuka S, Sasaki N, Hattori A, Okumura K, Nagai K, Sugano S, Isogai T (2007). "Signal sequence and keyword trap in silico for selection of full-length human cDNAs encoding secretion or membrane proteins from oligo-capped cDNA libraries". DNA Research. 12 (2): 117–26. doi:10.1093/dnares/12.2.117. PMID 16303743.
• Tanida I, Sou YS, Minematsu-Ikeguchi N, Ueno T, Kominami E (June 2006). "Atg8L/Apg8L is the fourth mammalian modifier of mammalian Atg8 conjugation mediated by human Atg4B, Atg7 and Atg3". The FEBS Journal. 273 (11): 2553–62. doi:10.1111/j.1742-4658.2006.05260.x. PMID 16704426. S2CID 11899126.

External links

• Human ATG7 genome location and ATG7 gene details page in the UCSC Genome Browser.