The Function of BAAT
Involved in bile acid metabolism. In liver hepatocytes catalyzes the second step in the conjugation of C24 bile acids (choloneates) to glycine and taurine before excretion into bile canaliculi. The major components of bile are cholic acid and chenodeoxycholic acid. In a first step the bile acids are converted to an acyl-CoA thioester, either in peroxisomes (primary bile acids deriving from the cholesterol pathway), or cytoplasmic at the endoplasmic reticulum (secondary bile acids). May catalyze the conjugation of primary or secondary bile acids, or both. The conjugation increases the detergent properties of bile acids in the intestine, which facilitates lipid and fat-soluble vitamin absorption. In turn, bile acids are deconjugated by bacteria in the intestine and are recycled back to the liver for reconjugation (secondary bile acids). May also act as an acyl-CoA thioesterase that regulates intracellular levels of free fatty acids. In vitro, catalyzes the hydrolysis of long- and very long-chain saturated acyl-CoAs to the free fatty acid and coenzyme A (CoASH), and conjugates glycine to these acyl-CoAs.
Protein names
Recommended name:
Bile acid-CoA:amino acid N-acyltransferaseShort name:
BATAlternative name(s):
BACATGlycine N-choloyltransferase
Long-chain fatty-acyl-CoA hydrolase
- RS1572983 (BAAT) ??
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Top Gene-Substance Interactions
Substances That Increase BAAT
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Substances That Decrease BAAT
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Advanced Summary
From NCBI Gene: Hypercholanemia, familialFrom UniProt: Familial hypercholanemia (FHCA): A disorder characterized by elevated serum bile acid concentrations, itching, and fat malabsorption. [MIM:607748]
From NCBI Gene: The protein encoded by this gene is a liver enzyme that catalyzes the transfer of C24 bile acids from the acyl-CoA thioester to either glycine or taurine, the second step in the formation of bile acid-amino acid conjugates. The bile acid conjugates then act as a detergent in the gastrointestinal tract, which enhances lipid and fat-soluble vitamin absorption. Defects in this gene are a cause of familial hypercholanemia (FHCA). Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008] From UniProt: Involved in bile acid metabolism. In liver hepatocytes catalyzes the second step in the conjugation of C24 bile acids (choloneates) to glycine and taurine before excretion into bile canaliculi. The major components of bile are cholic acid and chenodeoxycholic acid. In a first step the bile acids are converted to an acyl-CoA thioester, either in peroxisomes (primary bile acids deriving from the cholesterol pathway), or cytoplasmic at the endoplasmic reticulum (secondary bile acids). May catalyze the conjugation of primary or secondary bile acids, or both. The conjugation increases the detergent properties of bile acids in the intestine, which facilitates lipid and fat-soluble vitamin absorption. In turn, bile acids are deconjugated by bacteria in the intestine and are recycled back to the liver for reconjugation (secondary bile acids). May also act as an acyl-CoA thioesterase that regulates intracellular levels of free fatty acids. In vitro, catalyzes the hydrolysis of long- and very long-chain saturated acyl-CoAs to the free fatty acid and coenzyme A (CoASH), and conjugates glycine to these acyl-CoAs.
Conditions with Increased Gene Activity
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Conditions with Decreased Gene Activity
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Technical
The following transcription factors affect gene expression:
Tissue specificity:
Expressed in liver, gallbladder mucosa and pancreas.
Gene Pathways:
Molecular Function:
- Carboxylic Ester Hydrolase Activity
- Glycine N-Choloyltransferase Activity
- Long-Chain Acyl-Coa Hydrolase Activity
- Medium-Chain Acyl-Coa Hydrolase Activity
- N-Acyltransferase Activity
- Palmitoyl-Coa Hydrolase Activity
- Receptor Binding
- Transferase Activity, Transferring Acyl Groups
- Very Long Chain Acyl-Coa Hydrolase Activity
Biological Processes:
- Acyl-Coa Metabolic Process
- Animal Organ Regeneration
- Bile Acid Biosynthetic Process
- Bile Acid Conjugation
- Bile Acid Metabolic Process
- Fatty Acid Metabolic Process
- Glycine Metabolic Process
- Liver Development
- Taurine Metabolic Process