Pleckstrin homology domain-containing family M member 1 - Q9Y4G2 (PKHM1_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9Y4G2: 4
 
Function
Proposed to act as a multivalent adapter protein that regulates Rab7-dependent and HOPS complex-dependent fusion events in the endolysosomal system and couples autophagic and the endocytic trafficking pathways. Required for late stages of endolysosomal maturation, facilitating both endocytosis-mediated degradation of growth factor receptors and autophagosome clearance. Seems to be involved in the terminal maturation of autophagosomes and to mediate autophagosome-lysosome fusion (PubMed:25498145). Positively regulates lysosome peripheral distribution and ruffled border formation in osteoclasts (By similarity). May be involved in negative regulation of endocytic transport from early endosome to late endosome/lysosome implicating its association with Rab7 (PubMed:20943950). May have a role in sialyl-lex-mediated transduction of apoptotic signals (PubMed:12820725). Involved in bone resorption (By similarity). In case of infection contributes to Salmonella typhimurium pathogenesis by supporting the integrity of the Salmonella-containing vacuole (SCV) probably in concert with the HOPS complex and Rab7 (PubMed:25500191). UniProt
Pathway Maps
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Subunit Structure
Interacts (via N- and C-terminus) with RAB7A (GTP-bound form) (PubMed:20943950, PubMed:25500191). Interacts with VPS41, VPS11 and VPS39; indicative for an association with the HOPS complex; the interaction with VPS41 seems to require RAB7A (PubMed:25500191, PubMed:25498145). Interacts with GABARAP, GABARAPL, GABARAPL2, MAP1LC3A, MAP1LC3B and MAP1LC3C (PubMed:25498145). Interacts with PAFAH1B (By similarity). Interacts with Salmonella typhimurium sifA (PubMed:25500191). Interacts (via N- and C-terminus) with NDEL1 (By similarity). Interacts (via C-terminus) with MAP3K7 (By similarity). Interacts (via N- and C-terminus) with FAM98A (By similarity). Interacts (via C-terminus) with DEF8; this interaction is weak but increased in a RAB7A-dependent manner (By similarity). In colon carcinoma and breast carcinoma cells, it interacts with sialyl-lex-positive protein (PubMed:12820725). UniProt
Domain
The LIR (LC3-interacting region) motif mediates the interaction with ATG8 family proteins GABARAP, GABARAPL, GABARAPL2, and LC3A/B/C. UniProt
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Data in green originates from UniProtKB  
Variation data (sourced from UniProt) shows non-genetic variation from the ExPASy   and dbSNP   websites.
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in purple originates from Phosphosite  .
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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