PKD2L1

Polycystic kidney disease 2-like 1 protein also known as transient receptor potential polycystic 3 (TRPP3) is a protein that in humans is encoded by the PKD2L1 gene.

Function

TRPP3 is a member of the polycystin protein family. TRPP3 contains multiple transmembrane domains, and cytoplasmic N- and C-termini. TRPP3 may be an integral membrane protein involved in cell-cell/matrix interactions. TRPP3 functions as a calcium-regulated nonselective cation channel. Alternative splice variants have been described but their full length sequences have not been determined.

Interactions

PKD2L1 has been shown to interact with TNNI3.

See also

References

Further reading

TRPP

TRPP (Transient Receptor Potential Polycystic) is a family of transient receptor potential ion channels which when mutated can cause polycystic kidney disease.

Subcategories

TRPP subunits can be divided into two subcategories depending on structural similarity.

Polycystic Kidney Disease 1 (PKD1)-Like Group

The first group, polycystic kidney disease 1 (PKD1)-like, contains polycystin-1 (Previously known as TRPP1), PKDREJ, PKD1L1, PKD1L2, and PKD1L3. Polycystin-1 contains numerous N-terminal adhesive domains that are important for cell-cell contact. This group of subunits also contain a large extracellular domain with numerous polycystin motifs. These motifs are of unknown function and are located between the S6 and S7 segments. The large intracellular C-terminal segment of TRPP1 seems to interact with TRPP2 to act as a signaling complex.

Polycystic Kidney Disease 2 (PKD2)-Like Group

This group of TRPP members (previously known as TRPP2-like) are: TRPP1 (previously known as TRPP2 or PKD2), TRPP2 (previously known as TRPP3 or PKDL2), and TRPP3 (previously known as TRPP5 or polycystin-L2). Unlike the previous group, which contain 11 membrane-spanning segments, this group resemble other TRP channels, having 6 membrane-spanning segments with intracellular N- and C-termini. All of the members of this group contain a coiled coil region in their C-terminus involved in the interaction with the polycystin-1 group. TRPP1 and TRPP3 form constitutively active cation-selective ion channels that are permeable to calcium. TRPP2 has also been implicated in sour taste perception. Coupling of PKD1 and TRPP1 recruits TRPP1 to the membrane. Here, its activity is decreased and it suppresses the activation of G proteins by PKD1.

TRPP3

Polycystic kidney disease 2-like 2 protein (PKD2L2) also known as transient receptor potential polycystic 5 (TRPP5) is a protein that in humans is encoded by the PKD2L2 gene.

TRPP5 is a member of the transient receptor potential channel family of proteins.

See also

References

Further reading