RuBisCO

RuBisCO (provine de la ribulozo-1,5-bisfosfat carboxilază-oxigenază)^[1] este o enzimă implicată în prima etapă majoră din procesul de fixare a carbonului, prin care dioxidul de carbon atmosferic este convertit de plante și alte organisme fotosintetice la molecule care acționează ca sursă de energie, precum glucoza. Din punct de vedere chimic, enzima catalizează reacția de carboxilare a ribulozo-1,5-bisfosfatului (RuBP). Este probabil cea mai abundentă enzimă de pe Pământ.^[2]^[3]^[4]

Note[modificare | modificare sursă]

^ Sharkey TD (mai 2019). „Discovery of the canonical Calvin-Benson cycle”. Photosynthesis Research. 140 (2): 235–252. doi:10.1007/s11120-018-0600-2. OSTI 1607740. PMID 30374727.
^ Cooper GM (2000). „10.The Chloroplast Genome”. The Cell: A Molecular Approach (ed. 2nd). Washington, D.C: ASM Press. ISBN 978-0-87893-106-4. , one of the subunits of ribulose bisphosphate carboxylase (rubisco) is encoded by chloroplast DNA. Rubisco is the critical enzyme that catalyzes the addition of CO₂ to ribulose-1,5-bisphosphate during the Calvin cycle. It is also thought to be the single most abundant protein on Earth, so it is noteworthy that one of its subunits is encoded by the chloroplast genome.
^ Dhingra A, Portis AR, Daniell H (aprilie 2004). „Enhanced translation of a chloroplast-expressed RbcS gene restores small subunit levels and photosynthesis in nuclear RbcS antisense plants”. Proceedings of the National Academy of Sciences of the United States of America. 101 (16): 6315–6320. Bibcode:2004PNAS..101.6315D. doi:10.1073/pnas.0400981101 . PMC 395966 . PMID 15067115. (Rubisco) is the most prevalent enzyme on this planet, accounting for 30–50% of total soluble protein in the chloroplast;
^ Feller U, Anders I, Mae T (2008). „Rubiscolytics: fate of Rubisco after its enzymatic function in a cell is terminated”. Journal of Experimental Botany. 59 (7): 1615–1624. doi:10.1093/jxb/erm242. PMID 17975207.

Vezi și[modificare | modificare sursă]

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[Sharkey_2018-1] Sharkey TD (mai 2019). „Discovery of the canonical Calvin-Benson cycle”. Photosynthesis Research. 140 (2): 235–252. doi:10.1007/s11120-018-0600-2. OSTI 1607740. PMID 30374727.

[2] Cooper GM (2000). „10.The Chloroplast Genome”. The Cell: A Molecular Approach (ed. 2nd). Washington, D.C: ASM Press. ISBN 978-0-87893-106-4. , one of the subunits of ribulose bisphosphate carboxylase (rubisco) is encoded by chloroplast DNA. Rubisco is the critical enzyme that catalyzes the addition of CO₂ to ribulose-1,5-bisphosphate during the Calvin cycle. It is also thought to be the single most abundant protein on Earth, so it is noteworthy that one of its subunits is encoded by the chloroplast genome.

[Dhingra_2004-3] Dhingra A, Portis AR, Daniell H (aprilie 2004). „Enhanced translation of a chloroplast-expressed RbcS gene restores small subunit levels and photosynthesis in nuclear RbcS antisense plants”. Proceedings of the National Academy of Sciences of the United States of America. 101 (16): 6315–6320. Bibcode:2004PNAS..101.6315D. doi:10.1073/pnas.0400981101 . PMC 395966 . PMID 15067115. (Rubisco) is the most prevalent enzyme on this planet, accounting for 30–50% of total soluble protein in the chloroplast;

[Feller_2008-4] Feller U, Anders I, Mae T (2008). „Rubiscolytics: fate of Rubisco after its enzymatic function in a cell is terminated”. Journal of Experimental Botany. 59 (7): 1615–1624. doi:10.1093/jxb/erm242. PMID 17975207.

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