major histocompatibility complex class I receptor

A major histocompatibility complex class I receptor. These display processed antigens from the endocytosed bacteria. MHC class I proteins can form complexes with processed antigen peptides only if the antigen is synthesized in the same cell. As a consequence, T lymphocytes can only bind to class-I-positive cells that are synthesizing the antigen (e.g. virus-infected cells).

The breakdown into simpler components of any hormone, naturally occurring substances secreted by specialized cells that affects the metabolism or behavior of other cells possessing functional receptors for the hormone.

The chemical reactions involving progesterone, a steroid hormone produced in the ovary which prepares and maintains the uterus for pregnancy. Also found in plants.

Catalysis of the reaction: ATP + biotin + apo-(propanoyl-CoA:carbon-dioxide ligase (ADP-forming)) = AMP + diphosphate + (propanoyl-CoA:carbon-dioxide ligase (ADP-forming)).

Catalysis of the reaction: P(1),P(4)-bis(5'-nucleosyl)tetraphosphate + H2O = NTP + NMP. Acts on bis(5'-guanosyl)-, bis(5'-xanthosyl)-, bis(5'-adenosyl)- and bis(5'-uridyl)-tetraphosphate.

HLA-B specific inhibitory MHC class I receptor activity

A receptor that binds MHC class I molecules of the HLA-B subclass and mediates signaling that inhibits natural killer cell activity.

Catalysis of the reaction: 3-phospho-D-glyceroyl phosphate = 2,3-bisphospho-D-glycerate.

Catalysis of the reaction: 2,3-diphosphoglycerate + H2O = 3-phosphoglycerate + phosphate.

branched-chain amino acid aminotransferase activity

Catalysis of the reaction: L-leucine + 2-oxoglutarate = 4-methyl-2-oxopentanoate + L-glutamate.

Catalysis of the reaction: butanoyl-CoA + ETF = 2-butenoyl-CoA + reduced ETF.

Catalysis of a reaction that results in the formation of carbamoyl phosphate.

release of cytochrome c from mitochondria

The process by which cytochrome c is enabled to move from the mitochondrial intermembrane space into the cytosol, which is an early step in apoptosis and leads to caspase activation.