Protein
MAPK phosphothreonine lyase
Organism
Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)
Function
Secreted effector that irreversibly inactivates host MAP kinases by catalyzing the dephosphorylation of the phosphothreonine residue in the pT-X-pY motif in MAPK2/ERK2, MAPK3/ERK1, and p38, via a beta-elimination reaction leading to a dehydrobutyrine residue. Is also able to remove the phosphate group from phospho-JNK in vitro, but JNK may not be a substrate in vivo. Could help suppress localized proinflammatory responses at infection foci in the spleen and liver, and thereby facilitate bacterial growth.
Similarity
Belongs to the phosphothreonine lyase family.
Sequence
MPINRPNLNLNIPPLNIVAAYDGAEIPSTNKHLKNNFNSLHNQMRKMPVSHFKEALDVPDYSGMRQSGFFAMSQGFQLNNHGYDVFIHARRESPQSQGKFAGDKFHISVLRDMVPQAFQALSGLLFSEDSPVDKWKVTDMEKVVQQARVSLGAQFTLYIKPDQENSQYSASFLHKTRQFIECLESRLSENGVISGQCPESDVHPENWKYLSYRNELRSGRDGGEMQRQALREEPFYRLMTE