| ID | Sequence | Length | GC content |
|---|---|---|---|
| ACUCUGCUGUUGAGACGUUGGGGAGAUGAGGAGGAAUACCCAGAAAUAA… | 3678 nt | 0.3733 | |
| AAUUGUAAAGAGAGAGAAGUGGAUAAAUCAGUGCUGCUUUCUUUAGGAC… | 2820 nt | 0.3887 | |
| AAUUGUAAAGAGAGAGAAGUGGAUAAAUCAGUGCUGCUUUCUUUAGGAC… | 3618 nt | 0.3715 | |
| AAUUGUAAAGAGAGAGAAGUGGAUAAAUCAGUGCUGCUUUCUUUAGGAC… | 3429 nt | 0.3599 |
This gene encodes the class A macrophage scavenger receptors, which include three different types (1, 2, 3) generated by alternative splicing of this gene. These receptors or isoforms are macrophage-specific trimeric integral membrane glycoproteins and have been implicated in many macrophage-associated physiological and pathological processes including atherosclerosis, Alzheimer's disease, and host defense. The isoforms type 1 and type 2 are functional receptors and are able to mediate the endocytosis of modified low density lipoproteins (LDLs). The isoform type 3 does not internalize modified LDL (acetyl-LDL) despite having the domain shown to mediate this function in the types 1 and 2 isoforms. It has an altered intracellular processing and is trapped within the endoplasmic reticulum, making it unable to perform endocytosis. The isoform type 3 can inhibit the function of isoforms type 1 and type 2 when co-expressed, indicating a dominant negative effect and suggesting a mechanism for regulation of scavenger receptor activity in macrophages. [provided by RefSeq, Jul 2008]
A review of long non-coding RNAs (lncRNAs) in mammals and other eukaryotes, including human, mouse, Drosophila species, and yeast, synthesized findings from numerous studies, noting that one of the first characterized lncRNAs, the MSR1, was later found to have a dual function as it also encodes a protein that acts antagonistically to the function of the ncRNA [Mercer et al. DOI:10.1038/nrg2521]. A study in rats demonstrated that the MSR1 gene (Msr1) was significantly upregulated with a fold change greater than 4 at 1, 4, and 7 days following a contusive spinal cord injury, as identified through RNA sequencing screening [Li et al. DOI:10.4103/1673-5374.255994].