What is another name for this membrane protein for ABCA1?
cholesterol efflux regulatory protein (CERP)
Function of ABCA1 Membrane Protein ABCA1, also known as cholesterol efflux regulatory protein (CERP), functions as a cholesterol membrane transporter involved in the regulation of cellular cholesterol and phospholipid homeostasis.
What does ABCA1 gene do?
The ABCA1 gene belongs to a group of genes called the ATP-binding cassette family, which provides instructions for making proteins that transport molecules across cell membranes. The ABCA1 protein is produced in many tissues, with high amounts found in the liver and in immune system cells called macrophages.
Is ABC transporter a membrane protein?
ATP-binding cassette (ABC) transporters are a large superfamily of membrane proteins with diverse functions (Holland et al. 2003). They convert the energy gained from ATP hydrolysis into trans-bilayer movement of substrates either into the cytoplasm (import) or out of the cytoplasm (export).
Is ABCA1 a lipid transfer protein?
In this review, information is presented to answer the question of whether ABCA1 is a lipid transfer protein. It will become apparent that because the transporter mediates the transfer of PL (and FC) from a cell PM (donor) to apoA-I (acceptor), the simple answer is “yes”.
What chromosome is the ABCA1 gene on?
Chromosome 9
ABCA1
| Gene location (Human) | ||
|---|---|---|
| Chr. | Chromosome 9 (human) | |
| Band | 9q31.1 | Start |
| End |
What is ABCA1 cellular function quizlet?
ABCA1. major determinant of plasma HDL levels. transports cellular cholesterol and phospholipids (mostly phosphatidylcholine) to cell surface-bound apolipoproteins. Helps ApoA1 combine with cholesterol and phospholipids at the plasma membranes of various body cells to produce the discoidal nascent HDL.
What is Tangier’s disease?
Tangier disease is most often characterized by enlarged orange- or yellow-colored tonsils. This discoloration is due to fatty deposits accumulating in the tonsils. Fatty deposits can also form in other organs causing enlargement of the throat, liver, spleen, or lymph nodes.
What are ABC transporters that are found in bacterial membranes?
The canonical ABC transporter is organized in four functional units or domains, two NBDs (NBD1, NBD2) and two TMDs (TMD1, TMD2). In bacteria, the four domains can be a combination of individual, pairwise identical subunits, or a combination of fused NBDs and/or TMDs [12].
Is ABCA1 an enzyme?
ATP-binding cassette transporter ABCA1 (member 1 of human transporter sub-family ABCA), also known as the cholesterol efflux regulatory protein (CERP) is a protein which in humans is encoded by the ABCA1 gene….ABCA1.
| RNA expression pattern | |
|---|---|
| BioGPS | More reference expression data |
How does VLDL become LDL?
As the triglycerides on VLDL are broken down by the cells that need it, the particle becomes denser due to the change in the lipid to protein ratio. This results in VLDL being converted into IDL. As triglycerides and cholesterol are delivered to more cells in the body, IDL will gradually be converted into LDL.
How LDL cholesterol is formed?
LDL particles are formed when triglycerides are removed from VLDL by the lipoprotein lipase enzyme (LPL) and they become smaller and denser (i.e. fewer fat molecules with same protein transport shell), containing a higher proportion of cholesterol esters.
What does Tangier disease do to the body?
How many types of ABC transporters are there?
There are 48 ABC transporters in humans that can be subdivided by phylogenetic analysis into seven distinct subfamilies A-G [8,9].
How many ABC transporters are there?
What causes ABCA1 clearance from the plasma membrane?
ABCA1 mRNA clearance is induced by several microRNAs that result in repression and reduction of ABCA1 protein expression. Intracellular ABCA1 trafficking is enhanced toward the plasma membrane, leading to an elevation of cell-surface localization[review]
Why is ABCA1 upregulated in macrophages?
ABCA1 upregulation in macrophages inhibits the progression of atherosclerotic lesions ABCA1 is expressed in keratinocytes, where it is negatively regulated by a decrease in cellular cholesterol levels or altered permeability barrier requirements and regulated by activators of LXR, PPARs, and RXR or increases in cellular cholesterol levels
Does the ABCA1 r219k gene have a protective function?
The K allele of the ABCA1 R219K gene has a protective role for coronary artery disease risk in Chinese population. Two novel pathogenic mutations in the ABCA1 gene predicted to encode truncated proteins have been linked to Tangier disease and familial HDL deficiency.
Do molecular defects in the ABCA1 pathway affect platelet function?
“Molecular defects in the ABCA1 pathway affect platelet function”. Pathophysiology of Haemostasis and Thrombosis. 35 (1–2): 166–74. doi: 10.1159/000093563. PMID 16855366.