Repeat

HEAT (IPR000357)

Short name: HEAT

Description

The HEAT repeat is a tandemly repeated, 37-47 amino acid long module occurring in a number of cytoplasmic proteins, including the four name-giving proteins huntingtin, elongation factor 3 (EF3), the 65 Kd alpha regulatory subunit of protein phosphatase 2A (PP2A) and the yeast PI3-kinase TOR1 [PMID: 7550332]. Arrays of HEAT repeats consists of 3 to 36 units forming a rod-like helical structure and appear to function as protein-protein interaction surfaces. It has been noted that many HEAT repeat-containing proteins are involved in intracellular transport processes.

In the crystal structure of PP2A PR65/A [PMID: 9989501], the HEAT repeats consist of pairs of antiparallel alpha helices [PMID: 7550332].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0005515 protein binding

Cellular Component

No terms assigned in this category.

Contributing signatures

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