Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Enzyme component of specific activity or source
Reexamination Certificate
2000-11-11
2002-06-25
Douyon, Lorna M. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Enzyme component of specific activity or source
C510S392000, C510S320000, C510S515000, C510S530000, C424S094500, C435S193000, C008S137000
Reexamination Certificate
active
06410498
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to laundry detergent and/or fabric care compositions comprising a modified enzyme which comprises a catalytically active amino acid sequence of a transferase, linked to an amino acid sequence comprising a Cellulose Binding Domain (CBD).
BACKGROUND OF THE INVENTION
Laundry detergent and/or fabric care compositions include nowadays a complex combination of active ingredients which fulfill certain specific needs: a surfactant system, enzymes providing cleaning and fabric care benefits, bleaching agents, a builder system, suds suppressors, soil-suspending agents, soil-release agents, optical brighteners, softening agents, dispersants, dye transfer inhibition compounds, abrasives, bactericides, perfumes, and their overall performance has indeed improved over the years.
However, the complex nature of everyday “body” soils typically found on pillow cases, T-shirts, collars and socks, provides a continuous thorough cleaning challenge for detergents. These soils are difficult to remove completely and often residues build up on fabric leading to dinginess and yellowing. In addition, removal by detergents of stains stemming from plants, wood, mud-clay based soil and fruits is one of the toughest cleaning challenges, in particular with the tendency to move to low wash temperatures and shorter washing cycles. These stains typically contain complex mixtures of fibrous material, based mainly on carbohydrates and their derivatives, fibre and cell wall components. Such stains are generally accompanied by amylose, sugars and their derivatives.
In recent years, consumer desirability for fabric conditioning compositions has risen. Fabric softening compositions impart several desirable properties to treated garments including softness and static control. Fabric softness of laundered garments is typically achieved by delivering a quaternary ammonium compound to the surface of the fabric. Consumer desirability for durable press fabric garments, particularly cotton fabric garments, has also risen. Durable press garments include those garments which resist wrinkling of the fabric both during wear and during the laundering process. Durable press garments can greatly decrease the hand work associated with laundering by eliminating ironing sometimes necessary to prevent wrinkling of the garment. However, in most commercially available durable press fabrics, the fabric's ability to resist wrinkling is reduced over time as the garment is repeatedly worn and laundered. Furthermore, coloured garments have a tendency to wear and show appearance losses. A portion of this colour loss may be attributed to abrasion in the laundering process, particularly in automatic washing machines and automatic laundry dryers. Moreover, tensile strength loss of fabric appears as an unavoidable result of mechanical/chemical action due to use/wearing or washing.
As indicated above, there is a continuous need for a laundry detergent composition which provides fabric cleaning and/or fabric stain removal, especially on body soils and plant based stains and/or fabric whiteness maintenance and/or fabric colour appearance and/or dye transfer inhibition.
In addition, there is a continuous need for a laundry detergent composition and/or fabric care composition, which can provide, refurbish or restore tensile strength, anti-wrinkle, anti-bobbling and anti-shrinkage properties to fabrics, as well as provide static control, fabric softness, colour appearance and fabric anti-wear properties and benefits.
The above objectives have been met by formulating laundry detergent and/or fabric care compositions comprising modified enzyme which comprises a catalytically active amino acid sequence of a transferase, linked to an amino acid sequence comprising a Cellulose Binding Domain (CBD).
Transferase enzymes have been described in the art: A process for producing saccharides of a definite chain length such as maltose and maltooligosaccharides in an isolated and highly pure form using saccharide chain transferase such as cyclodextrin glycosyl transferase or &agr;-amylase, has been disclosed in EP 560 982 for pharmaceutical use. U.S. Pat. No. 5,516,689 describes an enzyme composition comprising transglucosidase and/or pectinase and a means of reducing the stickiness of honeydew contaminated cotton, to avoid severe problems during the milling of cotton. Microbial transglutaminases, their production and their use in a variety of industrial purposes have been described in WO96/06931. JP 7-107971 relates to a micro-organism belonging to the genus Bacillus and having the capacity to produce an alkali resistant cyclodextrin glucanotransferase for dishwashing applications wherein it demonstrates decomposition and removal of food soils and the produced cyclodextrin plays as a masking, desodorisation agent and it improves the sudsing properties and the emulsification of the soiling. Dishwashing detergent compositions containing cyclodextrin glucanotransferase with cleaning benefits and deodorising effect are described in JP 7-109488.
Enzymes linked to Cellulose Binding Domains are also described in the art: WO91/10732 novel derivatives of cellulase enzymes combining a core region derived from an endoglucanase producible by a strain of Bacillus spp., NICMB 40250 with a CBD derived from another cellulase enzyme or a combining a core region derived from another cellulase enzyme with a CBD derived from said endoglucanase, for improved binding properties. WO94/07998 describes cellulase variants of a cellulase classified in family 45, comprising a CBD, a Catalytically Active Domain (CAD) and a region linking the CBD to the CAD, wherein one or more amino acid residues have been added, deleted or substituted and/or another CBD is added at the opposite end of the CAD. WO95/16782 relates to the cloning and high level expression of novel truncated cellulase proteins or derivatives thereof in
Trichoderma longibrachiatum
comprising different core regions with several CBDs. WO97/01629 describes cellulolytic enzyme preparation wherein the mobility of the cellulase component may be reduced by adsorption to an insoluble or soluble carrier e.g. via the existing or newly introduced CBD. WO97/28243 describes a process for removal or bleaching or soiling or stains from cellulosic fabrics wherein the fabric is contacted in aqueous medium with a modified enzyme which comprises a catalytically active amino acid sequence of a non-cellulolytic enzyme selected from amylases, proteases, lipases, pectinases and oxidoreductases, linked to an amino acid sequence comprising a cellulose binding domain and a detergent composition comprising such modified enzyme and a surfactant.
Nevertheless, none of these documents discloses laundry detergent and/or fabric care compositions comprising a modified enzyme which comprises a catalytically active amino acid sequence of a transferase linked to an amino acid sequence comprising a Cellulose Binding Domain.
SUMMARY OF THE INVENTION
The present invention relates to a modified enzyme which comprises a catalytically active amino acid sequence of a transferase linked to an amino acid sequence comprising a Cellulose Binding Domain (CBD). In a second embodiment, the present invention relates to a laundry detergent and/or fabric care composition comprising such modified transferase enzyme, for improved fabric care and cleaning benefits. In a third embodiment, the present invention relates to a method comprising the step of contacting a fabric with the above laundry detergent and/or fabric care composition.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a modified enzyme (Enzyme hybrid) which comprises a catalytically active amino acid sequence of a transferase linked to an amino acid sequence comprising a Cellulose Binding Domain (CBD).
Transferase Enzyme and Substrates
Transferase enzymes catalyse the transfer of functional compounds to a range of substrates. Particularly, the transferase of the invention have the potential to transfer a chemical moiety, for example a methy
Barnabas Mary Vijayarani
Boyer Stanton Lane
Convents Andre Christian
Showell Michael Stanford
Smets Johan
Cook C. Brant
Douyon Lorna M.
Elhilo Eisa
Miller Steve W.
Procter & Gamble Company
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