Immobilization of biologically active protein on a support with a 7-18 carbon spacer and a bifunctional phospholipid
First Claim
1. A preparation comprisinga solid supporta monolayer forming spacer compound having an alkyl chain containing 7-18 carbon atoms, said spacer compound covalently bound to said support,a monolayer forming bifunctional phospholipid with two dissimilar functional groups, said phospholipid covalently bound to said spacer compound with one of said functional groups, anda biologically active protein covalently bound to said phospholipid through the other functional group of the latter.
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Abstract
Enzymes and certain other bioactive substances are immobilized on solid substrates which have sufficient functional groups such as hydroxyl or carboxyl. The bioactive substances are linked to the substrates through spacer compounds having a long open alkyl chain with 7-18 carbon atoms and also through phospholipid intermediates. The spacer compound is chemically linked to the substrate. The phospholipid is covalently linked to the spacer compound. Immobilized bioactive substances of the invention exhibit a marked increase in activity and stability. In a preferred embodiment, immobilized enzymes having a high degree of resistance to thermal inactivation are prepared.
164 Citations
20 Claims
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1. A preparation comprising
a solid support a monolayer forming spacer compound having an alkyl chain containing 7-18 carbon atoms, said spacer compound covalently bound to said support, a monolayer forming bifunctional phospholipid with two dissimilar functional groups, said phospholipid covalently bound to said spacer compound with one of said functional groups, and a biologically active protein covalently bound to said phospholipid through the other functional group of the latter.
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12. A method of making a preparation comprising a biologically active protein immobilized on a solid support, the method comprising the steps of:
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a) providing a solid support with hydroxyl groups b) covalently linking to said support a monolayer-forming spacer compound having an alkyl chain containing 7-18 carbon atoms, c) covalently bonding to said spacer compound a monolayer-forming bifunctional phospholipid having two dissimilar functional groups through one of said functional groups, and d) covalently bonding to said bifunctional phospholipid a biologically active protein through the other functional group of said phospholipid. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification