Mediates down-regulation of protein synthesis in response to stress conditions by the phosphorylation of the alpha subunit of eIF-2 (tif211) on 'Ser-52'. Protein synthesis is inhibited at the level of initiation. Activity is inhibited in the presence of heme.

Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. GCN2 subfamily.

639 amino acids

MRFFNAHKSAEDGNYSETTNAISLKNERQSRDLSVNKHGRMLLTALLENFCQLYDNNPAKSKRLFALICHTLQKIGILEEEYIEELAAVRSNYQDALHHLILQAREAIRLDDAEERLLALPDPTNVFEKFPQETALSKFSVDGLNVRQFRFRDLTLESWLQSRNSRYIEDFEEYSLLGRGGFGSVYHVRNKIDGAEYAMKKINSTFQQMSYSKIFREIKCLAKMDHPNVIRYFSSWVESTTEATQMPIVMSKNSSRVLGTSSYCDVNGMDSIIFEPTESSALTDDILFAEDPGTESIISTSRKSSYSSTTESSNFENLESPRNLHDSNVSTFNNTTILDDDYSSSMHISKTGPTHSFIIYIQMQLCFDDLESYLIRRNHFLSFPLCKEQIQLHTDLFRMIINGVMYVHEGVNLIHRDIKPSNIFLAKSLPEDRGSVPLISYNDKNDLKEYITPKIGDFGLVVENKKNTETALSFLERNHLPNLQDETQHIGTATYAAPELLDAMSSQHNKFTKKIDTFSLGMVLFELLHPFQTNMERATKLQDLRRGNLPEEFVEQHICESSLILWMTAKDPTKRPSLLEVLNCGLLLPNQVSMPNISNIVSTNHLDVETQMKLIMDENQRLREQIAVLRSRIQHLETR

73.4 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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