Among all known KRAS structures, eight are hypervariable region (HVR) peptides (flexible C-terminal structural elements), and the remaining 142 structures form a G domain (containing six chains and five helices) ( The RAS family of proteins, encoded by the highly homologous genes HRAS , NRAS , and KRAS , is the most common protein family, the genes of which (most importantly KRAS ) are mutated in human cancer ( KRAS mutation-activated signaling pathway could stimulate the expression of HRAS and NRAS proteins via the induction of eNOS and C118 expression to promote tumor growth ( KRAS occurs at codon 12 of the second exon, on the first or second nucleotide, resulting in a conformational change of the GTP-binding site and, thereby, reducing the intrinsic rate of GTP hydrolysis ( KRAS mutations mainly occur in GGT sequences, namely GAT (G12D, 40%), GTT (G12V, 33%), CGT (G12R, 15%), TGT (G12C), GCT (G12A) and AGT (G12S) ( KRAS mutations occur at codon 13 of the second exon (G13D, G13C, G13S and G13R) (7%), codon 61 of the third exon (Q61H, Q61R, Q61K and Q61L), codon 117 and 146 of the fourth exon (K117 and A146) (Figure 1)
This interaction site is less defined but comprises the glutathione moiety of Grx(SSG), parts of helix 3, and a conserved lysine/arginine residue that also contributes to the scaffold site 14,15
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Among these, stimulation of extracellular-signal-regulated kinases 1/2(ERK-1/2), c-Jun N-terminal kinase (JNK), and p38 kinase (p38) promotes cell apoptosis and aggravates intestinal inflammation
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Bleeding risk in patients receiving omega-3 polyunsaturated fatty acids: a systematic review and meta-analysis of randomized clinical trials
