ERLIN1

The protein encoded by this gene is part of a protein complex that mediates degradation of inositol 1,4,5-trisphosphate receptors in the endoplasmic reticulum. The encoded protein also binds cholesterol and regulates the SREBP signaling pathway, which promotes cellular cholesterol homeostasis. Defects in this gene have been associated with spastic paraplegia 62.

Full Name

ER Lipid Raft Associated 1

Research Area

Component of the ERLIN1/ERLIN2 complex which mediates the endoplasmic reticulum-associated degradation (ERAD) of inositol 1,4,5-trisphosphate receptors (IP3Rs). Involved in regulation of cellular cholesterol homeostasis by regulation the SREBP signaling pathway. Binds cholesterol and may promote ER retention of the SCAP-SREBF complex (PubMed:24217618).

(Microbial infection) Required early in hepatitis C virus (HCV) infection to initiate RNA replication, and later in the infection to support infectious virus production.

Biological Process

Cholesterol metabolic process Source: UniProtKB-KW
Negative regulation of cholesterol biosynthetic process Source: UniProtKB
Negative regulation of fatty acid biosynthetic process Source: UniProtKB
SREBP signaling pathway Source: UniProtKB
Ubiquitin-dependent ERAD pathway Source: UniProtKB

Cellular Location

Endoplasmic reticulum membrane. Associated with lipid raft-like domains of the endoplasmic reticulum membrane.

Involvement in disease

Spastic paraplegia 62, autosomal recessive (SPG62):
A form of spastic paraplegia, a neurodegenerative disorder characterized by a slow, gradual, progressive weakness and spasticity of the lower limbs. Rate of progression and the severity of symptoms are quite variable. Initial symptoms may include difficulty with balance, weakness and stiffness in the legs, muscle spasms, and dragging the toes when walking. In some forms of the disorder, bladder symptoms (such as incontinence) may appear, or the weakness and stiffness may spread to other parts of the body.

Topology

Cytoplasmic: 1-7
Helical: 8-28
Lumenal: 29-348