Catalysis of the reaction: D-mannonate + NAD(P)+ = D-mannuronate + NAD(P)H + H+.

Catalysis of the reaction: 3-(2-hydroxyphenyl)propanoate + H(+) + NADH + O(2) = 3-(2,3-dihydroxyphenyl)propanoate + H(2)O + NAD(+).

Catalysis of the reaction: (2R,3S)-tartrate + NAD(+) = dihydroxyfumarate + H(+) + NADH.

Catalysis of the reaction: threo-3-methyl-L-aspartate = L-glutamate.

Catalysis of the reaction: H(2)O + methylguanidine = methylammonium + urea.

Catalysis of the reaction: N-methyl-L-glutamate + A + H(2)O = L-glutamate + AH(2) + formaldehyde.

Catalysis of the reaction: methanol + NAD(+) = formaldehyde + H(+) + NADH.

Catalysis of the reaction: L-methionine + glyoxylate = 4-methylthio-2-oxobutanoate + glycine.

Catalysis of the reaction: L-methionine + H(+) = 3-methylthiopropanamine + CO(2).

Catalysis of the reaction: threo-3-methyl-L-aspartate = mesaconate + NH(4)(+).

The synthesis of RNA from a DNA template by RNA polymerase IV, originating at a Pol IV-specific promoter.

Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains an RNA polymerase IV specific promoter to direct initiation and catalyses DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains an RNA polymerase V specific promoter to direct initiation and catalyses DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains an RNA polymerase II specific promoter to direct initiation and catalyses DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains an RNA polymerase III specific promoter to direct initiation and catalyses DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Catalysis of the reaction: nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1). Utilizes a DNA template that contains an RNA polymerase I specific promoter to direct initiation and catalyzes DNA-template-directed extension of the 3'-end of an RNA strand by one nucleotide at a time. Can initiate a chain 'de novo'.

Binding to a single subunit plastid RNA polymerase enzyme, which is composed of a single catalytic subunit similar to the RNA polymerase enzymes from phages T3, T7, and SP6.

Binding to a single subunit RNA polymerase enzyme, which is composed of a single catalytic subunit similar to the RNA polymerase enzymes from phages T3, T7, and SP6.

Binding to a bacterial-type plastid PEP RNA polymerase core enzyme, typically consisting of two alpha, one beta, one beta prime, and one double prime subunit.