2p82: Difference between revisions

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[[Image:2p82.gif|left|200px]]
{{Seed}}
[[Image:2p82.png|left|200px]]


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{{STRUCTURE_2p82|  PDB=2p82  |  SCENE=  }}  
{{STRUCTURE_2p82|  PDB=2p82  |  SCENE=  }}  


'''Cysteine protease ATG4A'''
===Cysteine protease ATG4A===


==Overview==
We have cloned four human cDNAs encoding putative cysteine proteinases that have been tentatively called autophagins. These proteins are similar to Apg4/Aut2, a yeast enzyme involved in the activation of Apg8/Aut7 during the process of autophagy. The identified proteins ranging in length from 393 to 474 amino acids also contain several structural features characteristic of cysteine proteinases including a conserved cysteine residue that is essential for the catalytic properties of these enzymes. Northern blot analysis demonstrated that autophagins are broadly distributed in human tissues, being especially abundant in skeletal muscle. Functional and morphological analysis in autophagy-defective yeast strains lacking Apg4/Aut2 revealed that human autophagins-1 and -3 were able to complement the deficiency in the yeast protease, restoring the phenotypic and biochemical characteristics of autophagic cells. Enzymatic studies performed with autophagin-3, the most widely expressed human autophagin, revealed that the recombinant protein hydrolyzed the synthetic substrate Mca-Thr-Phe-Gly-Met-Dpa-NH(2) whose sequence derives from that present around the Apg4 cleavage site in yeast Apg8/Aut7. This proteolytic activity was diminished by N-ethylmaleimide, an inhibitor of cysteine proteases including yeast Apg4/Aut2. These results provide additional evidence that the autophagic process widely studied in yeast can also be fully reconstituted in human tissues and open the possibility to explore the relevance of the autophagin-based proteolytic system in the induction, regulation, and execution of autophagy.


==About this Structure==
==About this Structure==
2P82 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P82 OCA].  
2P82 is a 4 chains structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P82 OCA].  


==Reference==
==Reference==
Human autophagins, a family of cysteine proteinases potentially implicated in cell degradation by autophagy., Marino G, Uria JA, Puente XS, Quesada V, Bordallo J, Lopez-Otin C, J Biol Chem. 2003 Feb 7;278(6):3671-8. Epub 2002 Nov 21. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12446702 12446702]
<ref group="xtra">PMID:12446702</ref><ref group="xtra">PMID:15169837</ref><ref group="xtra">PMID:12473658</ref><references group="xtra"/>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Single protein]]
[[Category: Arrowsmith, C H.]]
[[Category: Arrowsmith, C H.]]
[[Category: Bochkarev, A.]]
[[Category: Bochkarev, A.]]
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[[Category: Transport]]
[[Category: Transport]]
[[Category: Ubl conjugation pathway]]
[[Category: Ubl conjugation pathway]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 12:34:41 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Feb 18 05:28:26 2009''

Revision as of 03:28, 18 February 2009

File:2p82.png

Template:STRUCTURE 2p82

Cysteine protease ATG4A

About this Structure

2P82 is a 4 chains structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

  1. Marino G, Uria JA, Puente XS, Quesada V, Bordallo J, Lopez-Otin C. Human autophagins, a family of cysteine proteinases potentially implicated in cell degradation by autophagy. J Biol Chem. 2003 Feb 7;278(6):3671-8. Epub 2002 Nov 21. PMID:12446702 doi:https://dx.doi.org/10.1074/jbc.M208247200
  2. Kabeya Y, Mizushima N, Yamamoto A, Oshitani-Okamoto S, Ohsumi Y, Yoshimori T. LC3, GABARAP and GATE16 localize to autophagosomal membrane depending on form-II formation. J Cell Sci. 2004 Jun 1;117(Pt 13):2805-12. PMID:15169837 doi:10.1242/jcs.01131
  3. Scherz-Shouval R, Sagiv Y, Shorer H, Elazar Z. The COOH terminus of GATE-16, an intra-Golgi transport modulator, is cleaved by the human cysteine protease HsApg4A. J Biol Chem. 2003 Apr 18;278(16):14053-8. Epub 2002 Dec 7. PMID:12473658 doi:10.1074/jbc.M212108200

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