ML domain, phosphatidylinositol/phosphatidylglycerol transfer protein (IPR033917)

Short name: ML_PG-PI_TP

Overlapping homologous superfamilies

Domain relationships


The MD-2-related lipid-recognition (ML) domain is implicated in lipid recognition, particularly in the recognition of pathogen related products. It has an immunoglobulin-like beta-sandwich fold similar to that of E-set Ig domains. This domain is present in proteins from plants, animals and fungi, including the following proteins:

  • Epididymal secretory protein E1 (also known as Niemann-Pick C2 protein - Npc2), which is known to bind cholesterol. Niemann-Pick disease type C2 is a fatal hereditary disease characterised by accumulation of low-density lipoprotein-derived cholesterol in lysosomes [PMID: 12591954].
  • House-dust mite allergen proteins such as Der f 2 from Dermatophagoides farinae and Der p 2 from Dermatophagoides pteronyssinus [PMID: 15710415].

This entry refers to the ML domain found in phosphatidylinositol/phosphatidylglycerol transfer protein (PG/PI-TP). PG/PI-TP has been shown to bind phosphatidylglycerol and phosphatidylinositol, but the biological significance of this is still obscure [PMID: 10023082].

GO terms

Biological Process

GO:0032366 intracellular sterol transport

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.