Catalase: Difference between revisions
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There are four oxygen atoms total in the reactants. Which do you think will be paired up after the reaction is completed (i.e. in the dixoxygen molecule O<sub>2</sub> from as one of the products)? | There are four oxygen atoms total in the reactants. Which do you think will be paired up after the reaction is completed (i.e. in the dixoxygen molecule O<sub>2</sub> from as one of the products)? | ||
== Structure == | |||
<StructureSection load='1gge' size='350' side='right' scene='46/467276/Cv/1' caption='E. coli catalase Hpii tetramer showing the heme groups in yellow. PDB-ID [[1gge]]'> | <StructureSection load='1gge' size='350' side='right' scene='46/467276/Cv/1' caption='E. coli catalase Hpii tetramer showing the heme groups in yellow. PDB-ID [[1gge]]'> | ||
Catalase is a <scene name='46/467276/Cv/2'>tetramer</scene>, each polypeptide chain is over 500 amino acids long. It contains <scene name='46/467276/Cv/3'>four porphyrin heme (iron) groups</scene> that allow the enzyme to react with the hydrogen peroxide. <scene name='46/467276/Cv/7'>Coordination of heme</scene> in ''E. coli'' catalase is by the four nitrogen atoms of the heme molecule, an oxygen from a tyrosine side chain and a water molecule (water molecules are shown as red spheres.).<ref>PMID:11455600</ref> | Catalase is a <scene name='46/467276/Cv/2'>tetramer</scene>, each polypeptide chain is over 500 amino acids long. It contains <scene name='46/467276/Cv/3'>four porphyrin heme (iron) groups</scene> that allow the enzyme to react with the hydrogen peroxide. <scene name='46/467276/Cv/7'>Coordination of heme</scene> in ''E. coli'' catalase is by the four nitrogen atoms of the heme molecule, an oxygen from a tyrosine side chain and a water molecule (water molecules are shown as red spheres.).<ref>PMID:11455600</ref> | ||