| IED ID | IndEnz0002014396 |
| Enzyme Type ID | protease014396 |
| Protein Name |
Cysteine protease ATG4b EC 3.4.22.- Autophagy-related protein 4 homolog b AtAPG4b Protein autophagy 4b |
| Gene Name | ATG4B APG4B At3g59950 F24G16.220 |
| Organism | Arabidopsis thaliana (Mouse-ear cress) |
| Taxonomic Lineage | cellular organisms Eukaryota Viridiplantae Streptophyta Streptophytina Embryophyta Tracheophyta Euphyllophyta Spermatophyta Magnoliopsida Mesangiospermae eudicotyledons Gunneridae Pentapetalae rosids malvids Brassicales Brassicaceae Camelineae Arabidopsis Arabidopsis thaliana (Mouse-ear cress) |
| Enzyme Sequence | MKAICDRFVPSKCSSSSTSEKRDISSPTSLVSDSASSDNKSNLTLCSDVVASSSPVSQLCREASTSGHNPVCTTHSSWTVILKTASMASGAIRRFQDRVLGPSRTGISSSTSEIWLLGVCYKISEGESSEEADAGRVLAAFRQDFSSLILMTYRRGFEPIGDTTYTSDVNWGCMLRSGQMLFAQALLFQRLGRSWRKKDSEPADEKYLEILELFGDTEASAFSIHNLILAGESYGLAAGSWVGPYAVCRSWESLARKNKEETDDKHKSFSMAVHIVSGSEDGERGGAPILCIEDVTKTCLEFSEGETEWPPILLLVPLVLGLDRVNPRYIPSLIATFTFPQSLGILGGKPGASTYIVGVQEDKGFYLDPHDVQQVVTVKKENQDVDTSSYHCNTLRYVPLESLDPSLALGFYCQHKDDFDDFCIRATKLAGDSNGAPLFTVTQSHRRNDCGIAETSSSTETSTEISGEEHEDDWQLL |
| Enzyme Length | 477 |
| Uniprot Accession Number | Q9M1Y0 |
| Absorption | |
| Active Site | ACT_SITE 173; /note=Nucleophile; /evidence=ECO:0000250|UniProtKB:Q9Y4P1; ACT_SITE 368; /evidence=ECO:0000250|UniProtKB:Q9Y4P1; ACT_SITE 370; /evidence=ECO:0000250|UniProtKB:Q9Y4P1 |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | CATALYTIC ACTIVITY: Reaction=[protein]-C-terminal L-amino acid-glycyl-phosphatidylethanolamide + H2O = [protein]-C-terminal L-amino acid-glycine + a 1,2-diacyl-sn-glycero-3-phosphoethanolamine; Xref=Rhea:RHEA:67548, Rhea:RHEA-COMP:17323, Rhea:RHEA-COMP:17324, ChEBI:CHEBI:15377, ChEBI:CHEBI:64612, ChEBI:CHEBI:172940, ChEBI:CHEBI:172941; Evidence={ECO:0000250|UniProtKB:Q9Y4P1};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:67549; Evidence={ECO:0000250|UniProtKB:Q9Y4P1}; |
| DNA Binding | |
| EC Number | 3.4.22.- |
| Enzyme Function | FUNCTION: Cysteine protease that plays a key role in autophagy by mediating both proteolytic activation and delipidation of ATG8 family proteins. The protease activity is required for proteolytic activation of ATG8 family proteins: cleaves the C-terminal amino acid of ATG8 proteins to reveal a C-terminal glycine (By similarity). Exposure of the glycine at the C-terminus is essential for ATG8 proteins conjugation to phosphatidylethanolamine (PE) and insertion to membranes, which is necessary for autophagy. In addition to the protease activity, also mediates delipidation of PE-conjugated ATG8 proteins (By similarity). {ECO:0000250|UniProtKB:Q2XPP4, ECO:0000250|UniProtKB:Q9Y4P1}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | |
| nucleotide Binding | |
| Features | Active site (3); Alternative sequence (3); Chain (1); Region (2) |
| Keywords | Alternative splicing;Autophagy;Cytoplasm;Hydrolase;Protease;Protein transport;Reference proteome;Thiol protease;Transport;Ubl conjugation pathway |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:Q8BGE6}. |
| Modified Residue | |
| Post Translational Modification | |
| Signal Peptide | |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | 14576160; 15960803; 16354162; 23039100; 24379391; 24658121; |
| Motif | |
| Gene Encoded By | |
| Mass | 52,202 |
| Kinetics | |
| Metal Binding | |
| Rhea ID | RHEA:67548; RHEA:67549 |
| Cross Reference Brenda |