Chimiro chehomoni abscisic acid (ABA) chinhu chakakosha kudzora mukudyara abiotic kusagadzikana kugadzirisa.Kudzora kwe-co-receptor PP2C protein senge ABI1 ndiyo yepakati hub yeABA chiratidzo chekufambisa.Pasi pemamiriro akajairwa, ABI1 inosunga kuprotein kinase SnRK2s uye inotadzisa kuita kwayo.ABA yakasungirirwa kumapuroteni ekugamuchira PYR1/PYLs inokwikwidza neSnRK2s mukunangana neABI1, nekudaro ichiburitsa SnRK2s uye kumisa mhinduro yeABA.
Chikwata chekutsvagisa chinotungamirwa naProfessor Xie Qi kubva kuInstitute of Genetics and Developmental Biology yeChinese Academy yeSainzi yagara ichidzidzira ubiquitination, nzira yekushandura mushure mekushandura iyo inodzora kusaina kweABA.Basa ravo rekare rakaratidza endocytosis yePYL4 yakapindirana nekuzivikanwa kweE2-yakafanana neprotein VPS23, uye ABA inokurudzira XBAT35 kuderedza VPS23A, nokudaro kusunungura inhibitory effect paABA receptor PYL4.Zvisinei, kana ABA kusaina kunosanganisira chaiwo E2 mapuroteni anodiwa kuti ubiquitination, uye kuti ABA siginecha inodzora ubiquitination haisati yanyatsonzwisiswa.
Munguva pfupi yapfuura, ivo vakaratidza chaiyo E2 enzyme UBC27, iyo inogadzirisa zvakanaka kusanaya kwemvura uye mhinduro yeABA muzvirimwa.Kuburikidza nekuongorora kweIP/MS, vakaona kuti ABA co-receptor ABI1 uye RING-mhando E3 ligase AIRP3 ari kudyidzana mapuroteni eUBC27.
Vakaona kuti UBC27 inodyidzana neABI1 uye inosimudzira kudzikisira kwayo, uye inomutsa chiitiko cheE3 cheAIRP3.AIRP3 inoshanda seE3 ligase yeABI1.
Pamusoro pezvo, ABI1 inoshandisa epistasis yeUBC27 neAIRP3, nepo basa reAIRP3 richitsamira paUBC27.Pamusoro pezvo, kurapwa kweABA kunokonzeresa kutaura kweUBC27, kunodzivirira kuderedzwa kweUBC27, uye kunosimudzira kudyidzana pakati peUBC27 neABI1.
Mhedzisiro iyi inoratidza iyo itsva E2-E3 yakaoma mukuderedzwa kweABI1 uye yakakosha uye yakaoma kudzora kweABA kusaina neiyo ubiquitination system.
Musoro webepa unonzi "UBC27-AIRP3 ubiquitination complex inoronga kusaina kweABA nekusimudzira kuderedzwa kweABI1 muArabidopsis thaliana."Yakaburitswa pamhepo paPNAS muna Gumiguru 19, 2020.
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