One-pot enzymatic sulfation process using 3'-phosphoadenosine-5'-phosphosulfate and recycled phosphorylated adenosine intermediates
First Claim
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1. A process for using 3'"'"'-phosphoadenine-5'"'"'-phosphosulfate (PAPS) in an enzyme-catalyzed sulfation of an acceptor with recycling of phosphorylated adenosine intermediates that comprises the steps of:
- (a) admixing the following ingredients in an aqueous medium containing magnesium and potassium ions within a single vessel to form an aqueous reaction medium(i) 3'"'"'-nucleotidase or 3'"'"'(2'"'"'),5'"'"'-bisphosphate nucleotidase;
(ii) ATP sulfurylase;
(iii) APS kinase;
(iv) pyrophosphorylase;
(v) a sulfotransferase;
(vi) at least one adenine-containing compound selected from the group consisting of ATP, ADP, AMP, APS, PAPS and PAP;
(vii) sulfate ion;
(viii) an ATP-regenerating system comprising a phosphate donor and a phosphorylating enzyme; and
(ix) a sulfate acceptor for said sulfotransferasethe concentration of said sulfate ion being greater than the concentration of all of said adenine-containing compound, and the activity of said 3'"'"'-nucleotidase being less than that of the enzymes of (ii)-(v); and
maintaining said aqueous reaction medium at a pH value of about 5 to about 10 at a temperature of about zero degrees C to about 40°
C. for a time period sufficient for said acceptor to be sulfated.
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Abstract
A process for the enzymatic synthase of sulfate esters is disclosed in which intermediate phosphorylated adenosine compounds are recycled to minimize enzyme inhibition. Exemplary enzymes include ATP sulfurylase, APS kinase and a sulfotransferase.
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Citations
6 Claims
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1. A process for using 3'"'"'-phosphoadenine-5'"'"'-phosphosulfate (PAPS) in an enzyme-catalyzed sulfation of an acceptor with recycling of phosphorylated adenosine intermediates that comprises the steps of:
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(a) admixing the following ingredients in an aqueous medium containing magnesium and potassium ions within a single vessel to form an aqueous reaction medium (i) 3'"'"'-nucleotidase or 3'"'"'(2'"'"'),5'"'"'-bisphosphate nucleotidase; (ii) ATP sulfurylase; (iii) APS kinase; (iv) pyrophosphorylase; (v) a sulfotransferase; (vi) at least one adenine-containing compound selected from the group consisting of ATP, ADP, AMP, APS, PAPS and PAP; (vii) sulfate ion; (viii) an ATP-regenerating system comprising a phosphate donor and a phosphorylating enzyme; and (ix) a sulfate acceptor for said sulfotransferase the concentration of said sulfate ion being greater than the concentration of all of said adenine-containing compound, and the activity of said 3'"'"'-nucleotidase being less than that of the enzymes of (ii)-(v); and maintaining said aqueous reaction medium at a pH value of about 5 to about 10 at a temperature of about zero degrees C to about 40°
C. for a time period sufficient for said acceptor to be sulfated. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification