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Methenyl-H4MPT cyclohydrolase

The enzyme A, A °-methenyl-H4MPT cyclohydrolase dehydrates A -formyl-H4MPT ioN N -methenyl-H4MPT [ 100,113,122,186]) ... [Pg.52]

Methenyl-H4MPT cyclohydrolase is usually assayed in the direction of hydrolysis (Reaction 14), although the dehydration reaction has been demonstrated [100,113, 122,186,356]. While assaying cyclohydrolase in the direction of hydrolysis, the rates... [Pg.77]

Methenyl-H4MPT cyclohydrolase has been purified from M. thermoautotrophicum (AH and Marburg) [100,113], Methanopyrus kandleri[i56], and methanol-grown M. barkeri ,(>]. Properties of these purified enzymes are given in Table 8. [Pg.79]

Methenyl-H4MPT cyclohydrolase is essential for H2—CO2 methanogenesis. Pathway analysis and enzyme level studies suggest that this enzyme is also involved in methanol oxidation [224,346]. In acetate catabolism it does not have an obvious role, and in Methanosarcina growing on acetate this enzyme is down-modulated [224,346]. [Pg.80]

All methylene-H4MPT dehydrogenases (both types) purified so far are monofunctional. In the H4folate system, the analogous enzyme can be monofunctional, or may have methenyl-H4folate cyclohydrolase and/or formyl-H4folate synthetase activity [362-371]. [Pg.82]

See other pages where Methenyl-H4MPT cyclohydrolase is mentioned: [Pg.47]    [Pg.57]    [Pg.76]    [Pg.80]    [Pg.83]    [Pg.123]    [Pg.159]    [Pg.47]    [Pg.57]    [Pg.76]    [Pg.80]    [Pg.83]    [Pg.123]    [Pg.159]    [Pg.145]    [Pg.53]    [Pg.77]    [Pg.122]    [Pg.135]    [Pg.160]    [Pg.79]   
See also in sourсe #XX -- [ Pg.49 , Pg.54 , Pg.55 , Pg.79 , Pg.80 , Pg.81 , Pg.123 ]



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