Function
Exhibits pyrophosphatase activity with stronger affinity for pyrophosphate (PPi), moderate affinity for ATP and ADP, and weak affinity for tripolyphosphate (PPPi) (PubMed:25185123, PubMed:28733390). No activity observed toward uridine substrate (PubMed:28733390). Negative regulator of the salicylic acid (SA)-mediated amplification of defense responses against both virulent and avirulent pathogens, including oomycetes (e.g. H.arabidopsidis) and bacteria (e.g. P.syringae). Represses systemic acquired resistance (SAR) (PubMed:25185123).
Sequence
MGQDSNGIEFHQKRHGLLKDQVQLVKRRDSIRYEIVSIQDRLSFEKGFFAVIRACQLLSQKNDGIILVGVAGPSGAGKTVFTEKILNFLPSVAVISMDNYNDSSRIVDGNFDDPRLTDYDTLLKNLEDLKEGKQVEVPIYDFKSSSRVGYRTLDVPPSRIVIIEGIYALSEKLRPLLDLRVSVTGGVHFDLVKRVLRDIQRAGQQPEEIIHQISETVYPMYKAFIEPDLQTAQIKIINKFNPFTGFQSPTYILKSRKEVSVDQIKAVLSDGHTETKEETYDIYLLPPGEDPESCQSYLRMRNKDGKYSLMFEEWVTDTPFVISPRITFEVSVRLLGGLMALGYTIATILKRNSHVFATDKVFVKIDWLEQLNRHYMQVQGKDRQLVQSTAEQLGLEGSFIPRTYIEQIQLEKLINEVMALPDDLKNKLSLDEDLVSSSSPKEALLRASADRVAMRNKNLKRGMSHSYSTQRDKNLSKLAGYSSSDRRYEERNHDSPANEGFMTLLSEQISSLNERMDEFTSRIEELNSKLSCNKNSPTQQSLSIQTEVCNGSAPTSYFISGLDNGCLTNSIMPHSSSSSQLAKDSPLMEEISTISRGQRQVMHQLDNLCNLMRESSAERSRLARTGSSNSGNRGRSSKSSFLSNVESNKLPLVLTVAICSIGIIVIKSYINKRQ