ta-siRNA processing

A process leading to the generation of a functional trans-acting small interfering RNA (ta-siRNA). ta-siRNAs function like miRNAs to guide cleavage of target mRNAs.

tail-anchored membrane protein insertion into ER membrane

A process of protein insertion into the endoplasmic reticulum (ER) membrane in which a tail-anchored (TA) transmembrane protein is incorporated into an endoplasmic reticulum (ER) membrane. TA transmembrane protein, also named type II transmembrane proteins, contain a single C- terminal transmembrane region.

ER membrane insertion complex

A protein complex that is involved in the post-translational delivery of tail-anchored (TA) membrane proteins to the endoplasmic reticulum. TA membrane proteins, also called type II transmembrane proteins, contain a single C-terminal transmembrane region. Some ER membrane insertion complex subunits are conserved between different species such as mammals and budding yeast.

TRC complex

A protein complex found in yeast that contains GET4, MDY2 (GET5), SGT2, and at least two heat shock proteins, HSP104 and YBR137W. The TRC complex transfers tail-anchored (TA) proteins to GET3 for targeting to the endoplasmic reticulum membrane.

BRCA1-C complex

A protein complex that contains the BRCA1-BARD1 heterodimer, CtIP and Mre11/Rad50/NBS1 (M/R/N) complex, and binds to DNA at DNA damage sites. BRCA1-C binding ta damaged DNA is required for DNA damage-induced Chk1 phosphorylation and the G2/M transition checkpoint.

BAT3 complex

A protein complex found in mammals that transfers tail-anchored (TA) proteins from SGTA to GET3 (ASNA1/TRC4) for targeting to the endoplasmic reticulum membrane. Also chaperones polypeptides from the endoplasmic reticulum retrotranslocation machinery to the proteasome, maintaining the solubility of substrates to improve ER-associated protein degradation (ERAD). Consists of BAG6 (BAT3) and its cofactors GET4 (TRC35) and UBL4A.

gamma-aminobutyrate shunt

The chemical reactions and pathways resulting in the formation of succinate from glutamate. Also known as GABA (gamma-aminobutyrate) shunt since it channels glutamate into the TCA cycle bypassing two steps of that cycle. There are three enzymes involved in the GABA shunt: glutamate decarboxylase (GAD), GABA aminotransferase (GABA-TA), and succinate semialdehyde dehydrogenase (SSADH). These three enzymes acting in concert to convert glutamate into succinate. The GABA shunt is predominantly associated with neurotransmission in the mammalian brain. It is also present in nonneuronal cells, in plants, in unicellular eukaryotes, and in prokaryotes.