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Pirogrožđana kiselina

Pirogrožđana kiselina
Općenito
Hemijski spojPirogrožđana kiselina
Druga imenaα-ketopropionska kiselina; acetilforminska kiselina; pikoracemska kiselina; Pyr
Molekularna formulaC3H4O3
CAS registarski broj127-17-3
SMILESO=C(C(=O)O)C
Osobine1
Molarna masa88,06 g/mol
Gustoća1,250 g/cm3
Tačka topljenja11.8
Tačka ključanja165
1 Gdje god je moguće korištene su SI jedinice. Ako nije drugačije naznačeno, dati podaci vrijede pri standardnim uslovima.
3D struktura pirogrožđane kiseline

Pirogrožđana kiselina ili piruvinska kiselina (CH3COCOOH) je ketonska organska kiselina, najjednostavnija od alfa-ketokiselina. Karboksilni (COO) anion piruvinske kiseline, njene Brensted-Laurijeve konjugirane baze: CH3COCOO, poznat je kao piruvat, koji predstavlja centralni međustupanj i raskrsnica nekoliko metaboličkih puteva.

Pirogrožđana kiselina može nastaati iz glukoze, u procesu glikolize i konvertirati nazad u ugljikohidrate (kao što je glukoza) putem glukoneogeneze ili u masne kiseline preko acetil-KoA. Također se može koristiti za formiranje aminokiseline alanina i konvertirati u etanol.

Piruvinska kiselina snabdijeva energijom žive ćelije u ciklusu limunske kiseline (Krebsovog ciklusa), u prisustvu kisika, tj. aerobnom ćelijskom disanju), a alternativno se u mliječnu kiselinu u odsustvu kisika (fermentacija).[1][2]

Reference

[uredi | uredi izvor]
  1. ^ Hunter G. K. (2000): Vital Forces. The discovery of the molecular basis of life. Academic Press, London 2000, ISBN 0-12-361811-8.
  2. ^ Nelson D. L., Cox M. M. (2013): Lehninger Principles of Biochemistry. W. H. Freeman and Co., ISBN 978-1-4641-0962-1.

Vanjsi linkovi

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Pirogrožđana kiselina
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