Sortilin-related receptor, also known as Sorting protein-related receptor containing LDLR class A (SorLA), is a Type I membrane protein that may be involved in cell-cell interaction. SorLA, a single transmembrane receptor, binds LDL (the main cholesterol-carrying lipoprotein of plasma) and transports it into cells by endocytosis. SorLA is synthesized as a proreceptor which is processed to the mature form by a furin-like propeptidase. It can also bind to RAP, receptor-associated protein. SorLa is a multifunctional endocytis receptor important in lipoprotein and protease uptake. The N-terminal propeptide, which is removed, can be cleaved by furin or homologous proteases. Endogenous sorLA binds the neuropeptide head activator (HA) and is important for HA signaling and function. It is expressed mainly in brain (cerebral cortex, cerebellum and the occipital pole), but can also be found in liver, spinal cord, kidney, testis and pancreas.
Function:
Likely to be a multifunctional endocytic receptor, that may be implicated in the uptake of lipoproteins and of proteases. Binds LDL, the major cholesterol-carrying lipoprotein of plasma, and transports it into cells by endocytosis. Binds the receptor-associated protein (RAP). Could play a role in cell-cell interaction.
Subunit:
Belongs to the SORL1 family.
Contains 5 BNR repeats.
Contains 1 EGF-like domain.
Contains 6 fibronectin type-III domains.
Contains 11 LDL-receptor class A domains.
Contains 5 LDL-receptor class B repeats.
Subcellular Location:
Membrane.
Tissue Specificity:
Expressed mainly in brain, where it is most abundant in the cerebellum, cerebral cortex and the occipital pole; low expression in the putamen and the thalamus. According to PubMed:9157966, found in spinal cord, testis, liver, kidney and pancreas with detectable levels in placenta, lung and heart. According to PubMed:8940146, expressed in the prostate, ovary, thyroid and spleen, but not found in kidney, liver, lung, skeletal muscle, bone marrow and adrenals.
Post-translational modifications:
The propeptide removed in the N-terminus may be cleaved by furin or homologous proteases.
Similarity:
Belongs to the VPS10-related sortilin family. SORL1 subfamily.
Contains 5 BNR repeats.
Contains 1 EGF-like domain.
Contains 6 fibronectin type-III domains.
Contains 11 LDL-receptor class A domains.
Contains 5 LDL-receptor class B repeats.
SWISS:
Q92673
Gene ID:
6653
Database links:
Entrez Gene: 6653 Human
Entrez Gene: 20660 Mouse
Entrez Gene: 300652 Rat
Omim: 602005 Human
SwissProt: Q92673 Human
SwissProt: O88307 Mouse
SwissProt: Q9R0N2 Rat
Unigene: 368592 Human
Unigene: 121920 Mouse
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