Polycystic kidney disease 2-like 1 protein - Q9P0L9 (PK2L1_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9P0L9: 2
Pore-forming subunit of a ciliary calcium channel that controls calcium concentration within primary cilia without affecting cytoplasmic calcium concentration. Forms a heterodimer with PKD1L1 in primary cilia and forms a calcium-permeant ciliary channel that regulates sonic hedgehog/SHH signaling and GLI2 transcription. May act as a sour taste receptor by forming a calcium channel with PKD1L3 in gustatory cells; however, its contribution to sour taste perception is unclear in vivo and may be indirect. (data source: UniProt  )
Subunit structure
Homotrimer; trimerization is independent of calcium-binding. Calcium channels are probably composed of 3 subunit of PKD2L1 and 1 subunit of some PKD1 protein (PKD1, PKD1L1, PKD1L2 or PKDL3). Interacts with PKD1. Interacts with PKD1L1; to form ciliary calcium channel. Interacts with PKD1L3, to form putative sour taste receptor. Interacts with GNB2L1; inhibits the channel activity possibly by impairing localization to the cell membrane. (data source: UniProt  )
The EF-hand domain probably mediates calcium-binding. It is not required for channel activation (PubMed:11959145). (data source: UniProt  )
This protein in other organisms (by gene name):
Organism (common name): Human
Other Gene names: PKD2L PKDL TRPP3
Isoforms: 5, currently showing only the 'canonical' sequence.
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Data origin/color codes
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Data in green originates from UniProtKB  
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 Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  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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Validation Track

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Data in red indicates combined ranges of Homology Models from SBKB   and the Protein Model Portal  
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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