Protein that can both mediate the addition of adenosine 5'-monophosphate (AMP) to specific residues of target proteins (AMPylation), and the removal of the same modification from target proteins (de-AMPylation), depending on the context (By similarity). The side chain of Glu-251 determines which of the two opposing activities (AMPylase or de-AMPylase) will take place (By similarity). Acts as a key regulator of the unfolded protein response (UPR) by mediating AMPylation or de-AMPylation of Hsc70-3/BiP. In unstressed cells, acts as an adenylyltransferase by mediating AMPylation of Hsc70-3/BiP at 'Thr-518', thereby inactivating it. In response to endoplasmic reticulum stress, acts as a phosphodiesterase by mediating removal of ATP (de-AMPylation) from Hsc70-3/BiP at 'Thr-518', leading to restore HSPA5/BiP activity (By similarity).

Belongs to the fic family.

500 amino acids

MCSVCEGSAEGLVTRKRTHSGGGRSAGSKRKWHRRMGGLSFLIFFVIGSLFSGLMFALLSYAPSYRSRVTPHYLPDGRFLQIADEARVLEPYLSAAVRLPDSLNGTPAGKQQQTARSNEQEALSSLKVAVEMKLMGKDDKALRLFQHAMALSPRHPEILTKYGEFLEHSQQDIVTADHYYYQALTVNPSHSEALANRQRTASIVEHLDQKRFERLDKKRDALSSVHALDAGLKRAEKEAYIQHIYHSVGIEGNTMSLAQTRSILETKMAVDGKSIDEHNEILGLDAAMKYINATLVNKNDFITLKDLLEIHRRVLGHVDPVEGGEFRRTQVYVGGHIPPGPGDLSILMSRFEGWLNAEQSFLMHPVRYAAMAHYKLVHIHPFSDGNGRTSRLLMNTLLMRAGYPPVIIQKQHRHKYYDYLQVANEGDIRPFVRFIADCTERTLDLYLWATSELSHPVPLLAQEEMGGAIGEREHGFGREGGSTVHEGSGTGDSIRIGTMW

56 kDa

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

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