Mitochondrial glutamic-oxaloacetic transaminase (GOT2) in the growth of C2C12 myoblasts.

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Tác giả: Brian D Fink, Adam J Rauckhorst, William I Sivitz, Ritu Som, Eric B Taylor

Ngôn ngữ: eng

Ký hiệu phân loại: 232.964 Burial

Thông tin xuất bản: United States : Journal of bioenergetics and biomembranes , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 111271

Glutamine is well recognized as critical to the growth of most cell types. Within mitochondria glutamine is converted to glutamate by glutaminase. Oxaloacetate and glutamate then react to form alpha-ketoglutarate (α-KG) and aspartate catalyzed by glutamic-oxaloacetic transaminase (GOT2) or directly converted to α-KG by glutamate dehydrogenase (GDH). We investigated the role of GOT2 in mediating glutamate metabolism and cell growth in undifferentiated C2C12 cells. CRISPR mediated GOT2 knockout (KO) impaired cell growth, partially overcome by higher concentrations of glutamine. Mitochondrial respiration did not differ between KO and wildtype (WT) cells. Metabolite profiling showed that GOT2KO decreased aspartate by about 50% in KO versus WT cells. In contrast, α-KG increased. Metabolites reflecting the pentose phosphate pathway were significantly increased in KO cells. Metabolic pathway analyses revealed alteration of the TCA cycle, the pentose phosphate pathway, and amino acid metabolism. Glutamine
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