二磷酸核酮糖羧化酶（RuBP carboxylase，rubisco，RuBisCO，1,5-二磷酸核酮糖加氧酶）
是叶绿体中含量最多的蛋白质 用来固定$
这个反应的产物，是一种含6个碳且不稳定的中间产物，其立即就会分裂为二摩尔的[[C3：3-磷酸甘油酸（PGA,3PG）]]：
总反应：
[[C5：二磷酸核酮糖（ribulose bisphosphate，RuBP）]]+$ <->2[[C3：3-磷酸甘油酸（PGA,3PG）]]
-
\usepackage{chemfig}
\definecolor{cpk_P}{rgb}{1.00, 0.50, 0.00} % P
\begin{document}
\chemfig{
(-[2,1.5,,,transparent]) %上支撑
(-[3.5,0.8]O
% P
(-[0,-0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 上边界支撑
-[2,0.5,,,,transparent]
)
)
(-[0.5,0.8]
(=[2,0.8]O)
(-[7.5,0.8]
(<[6,0.8]OH)
(-[0.5,0.8]
(<:[2,0.8]OH)
(-[7.5,0.8]
-[0.5,0.8]O
% P
(-[0,0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 上边界支撑
-[2,0.5,,,,transparent]
)
)
)
)
)
}
+
{2}$
+
{2}O$
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {RuBisCO} (2,0);
\end{tikzpicture}
\chemfig{
(-[2,1.5,,,transparent]) %上支撑
(=[6,0.8]O)
(-[0.5,0.8]OH)
(-[3.5,0.8]
(<[2,0.8]OH)
(-[4.5,0.8]
-[3.5,0.8]O
% P
(-[0,-0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 上边界支撑
-[2,0.5,,,,transparent]
)
)
)
}
+
\chemfig{
(-[2,1.5,,,transparent]) %上支撑
(=[6,0.8]O)
(-[3.5,0.8]HO)
(-[0.5,0.8]
(<:[2,0.8]OH)
(-[7.5,0.8]
-[0.5,0.8]O
% P
(-[0,0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 上边界支撑
-[2,0.5,,,,transparent]
)
)
)
}
\end{document}-
\usepackage{chemfig}
\definecolor{cpk_P}{rgb}{1.00, 0.50, 0.00} % P
\begin{document}
\chemfig{
(-[2,1.7,,,transparent]) %上支撑
C(-[4,0.3]H_2)
(-[,0.8]O
% P
(-[0,0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 上边界支撑
-[2,0.5,,,,transparent]
)
)
(-[6,0.8]C
(=[4,0.8]O)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]O
% P
(-[0,0.34,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 下边界支撑
-[6,0.5,,,,transparent]
)
)
)
)
)
)
}
+
{2}$
+
{2}O$
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {RuBisCO} (2,0);
\end{tikzpicture}
2
\chemfig[atom sep=2em]{
(-[2,1.2,,,transparent]) %上支撑
COO^{-}
-[6]C(-OH)(-[4]H)
-[6]CH_2O
% P
(-[0,0.54,,,,transparent]{\chemmove{\draw[ultra thick,green,fill=cpk_P,line width=2pt] (0.1,0.12)circle(6pt);}P}
% 下边界支撑
-[6,0.5,,,,transparent]
)
}
\end{document}需要rubisco、^{2+}$，不需要生物素 不消耗能量
中间产物： [[C5：烯二醇中间产物]] [[C6：水合中间物]] [[C6：β 酮酸中间物]] [[C3：另外一个产物]]
分解步骤
$化学方程式：$
1. [[C5：二磷酸核酮糖（ribulose bisphosphate，RuBP）]]<->[[C5：烯二醇中间产物]] -
\usepackage{chemfig}
\begin{document}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(=[4,0.8]O)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {} (1,0);
\end{tikzpicture}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(=[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
\end{document}2. [[C5：烯二醇中间产物]]+$+$<->[[C6：β 酮酸中间物]] -
\usepackage{chemfig}
\begin{document}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(=[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.8]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
+\chemfig{
C
(=[7.5,0.5]O)
(=[4.5,0.5]O)
}
+$
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {} (1,0);
\end{tikzpicture}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]COOH)
(-[6,0.8]C
(=[,0.8]O)
(-[6,0.8]C
(-[4,0.2]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
\end{document}3. [[C6：β 酮酸中间物]]<->[[C6：水合中间物]]+^+$ -
\usepackage{chemfig}
\begin{document}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]COOH)
(-[6,0.8]C
(=[,0.8]O)
(-[6,0.8]C
(-[4,0.2]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {} (1,0);
\end{tikzpicture}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]COOH)
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.2]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
+^+$
\end{document}4. [[C6：水合中间物]]<->[[C3：3-磷酸甘油酸（PGA,3PG）]]+[[C3：另外一个产物]] -
\usepackage{chemfig}
\begin{document}
\chemfig{
C(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]COOH)
(-[6,0.8]C
(-[4,0.8]HO)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.2]H)
(-[,0.8]OH)
(-[6,0.8]C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
)
)
)
)
}
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {} (1,0);
\end{tikzpicture}
\chemfig{
COOH
(-[6,0.5]C(-[,0.6]OH)
(-[6,0.5]CH_2
(-[,0.8]\fbox{P}
)
)
)
}
+
\chemfig{
C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[,0.8]COOH)
(-[4,0.8]HO)
)
}
\end{document}5. [[C3：3-磷酸甘油酸（PGA,3PG）]]<->[[C3：另外一个产物]] -
\usepackage{chemfig}
\begin{document}
\chemfig{
COOH
(-[6,0.5]C(-[,0.6]OH)
(-[6,0.5]CH_2
(-[,0.8]\fbox{P}
)
)
)
}
+^+$
\begin{tikzpicture}
\draw [<->] (0,0) to node[above] {} (1,0);
\end{tikzpicture}
\chemfig{
C
(-[4,0.3]H_2)
(-[,0.8]\fbox{P})
(-[6,0.8]C
(-[,0.8]COOH)
(-[4,0.8]HO)
)
}
\end{document}