Paura L-Tyrosine
l-tyrosine
kupu whakataki poto
Ko te Tyrosine (whakarāpopototanga ko Tyr, ko Y rānei) ko te 4-hydroxyphenylalanine rānei tētahi o ngā waikawa amino 22 e whakamahia ana e ngā pūtau hei hanga pūmua. Ka taea te whakamahi hei hanga pūmua i roto i ngā pūtau, me ngā codon UAC me UAU. He waikawa amino kore-tino nui kei roto ngā rōpū taha porotaka, ā, ka taea te hanga e te tinana tangata. Ko te kupu 'tyrosine' i ahu mai i te kupu Kariki tyros, ko te tikanga he tiihi. I te tīmatanga o te rautau 19, i kitea tuatahitia e te kaimātai matū Tiamana a Eustus von Libich i roto i te tiihi casein, ā, ina whakamahia hei rōpū mahi, hei rōpū taha rānei, ka kiia ko te tyrosine.
mahi
Haunga te noho hei waikawa amino pūmua, he mahi motuhake tā te tyrosine i roto i te whakawhiti tohu i roto i ngā pūmua mā te whakawhirinaki ki ngā rōpū mahi phenolic. Ko tana mahi he kaiwhiwhi mō ngā rōpū phosphate e tukuna ana e ngā kinase pūmua (e kiia nei ko ngā kaiwhiwhi tyrosine kinase), i te mea ka whakarerekē te phosphorylation o ngā rōpū hydroxyl i te mahi a te pūmua ūnga.
He mahi nui anō tā te tyrosine i roto i te photosynthesis, hei kaiwhakarato irahiko i roto i te tauhohenga whakaiti o te chlorophyll kua waikurahia i roto i ngā chloroplasts (Photosystem II), te tango i te protonation o ngā rōpū OH phenolic, ā, hei whakamutunga, te whakaiti mā roto i ngā tautau manganese matua e whā i roto i te Photosystem II.
Ngā puna kai
Ka taea te hanga i te tyrosine mai i te phenylalanine i roto i te tinana, ā, ka kitea i roto i ngā kai pūmua nui pērā i te heihei, te tāki, te ika, te miraka, te miraka kawa, te tiihi, te tīhi, te pīnati, te aramona, te kākano paukena, te hīhiama, te pīni soya, te pīni rima, te āwōkātō, me te panana.
He waikawa amino kore-tino te L-tyrosine, ā, ko tētahi o ngā matū matua i roto i te ara pākia o te methionine. He whānuitia te kitea i roto i ngā rauropi, ā, he mea nui tana mahi i roto i ngā tukanga koiora maha.
He wāhanga o ngā pūmua te L-tyrosine, ā, e whai wāhi ana ki te tukanga hanga pūmua. He matū hoki ia mō ngā matū koiora maha, tae atu ki ngā neurotransmitters catecholamine pērā i te dopamine, te norepinephrine, me te adrenaline, tae atu ki ngā homoni tairoi me te melanin.
Hei tāpiritanga, kei te whai wāhi atu hoki a L-tyrosine ki te hanga i ngā ngota koiora nui mā roto i tētahi raupapa o ngā whākōkī i roto i te tinana, pērā i te tyrosine kinase me te tyrosine hydroxylase, e whai wāhi ana ki ngā ara tohu kinase me te whakahaere ā-tinana.
Ka taea te whiwhi i te L-tyrosine mā te kai, me ngā puna kai maha tae atu ki ngā nati, ngā purapura, te mīti, te ika, me ngā hua miraka. Hei tāpiri, ka taea hoki te huri i te L-tyrosine mai i tētahi atu waikawa amino, te phenylalanine, mā te ara hanga tyrosine i roto i te tinana.
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