1cus

From Proteopedia

FUSARIUM SOLANI CUTINASE IS A LIPOLYTIC ENZYME WITH A CATALYTIC SERINE ACCESSIBLE TO SOLVENT

Structural highlights

1cus is a 1 chain structure with sequence from Fusarium vanettenii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.25Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CUTI1_FUSVN Catalyzes the hydrolysis of complex carboxylic polyesters found in the cell wall of plants (PubMed:18658138, PubMed:19810726, PubMed:8286366, PubMed:8555209). Degrades cutin, a macromolecule that forms the structure of the plant cuticle (PubMed:18658138, PubMed:19810726, PubMed:8286366, PubMed:8555209). Allows pathogenic fungi to penetrate through the cuticular barrier into the host plant during the initial stage of fungal infection (Ref.4).^[1] ^[2] ^[3] ^[4] [PROSITE-ProRule:PRU10109]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Lipases belong to a class of esterases whose activity on triglycerides is greatly enhanced at lipid-water interfaces. This phenomenon, called interfacial activation, has a structural explanation: a hydrophobic lid, which at rest covers the catalytic site, is displaced on substrate or inhibitor binding and probably interacts with the lipid matrix. Fusarium solani pisi cutinase belongs to a group of homologous enzymes of relative molecular mass 22-25K (ref. 7) capable of degrading cutin, the insoluble lipid-polyester matrix covering the surface of plants, and hydrolysing triglycerides. Cutinases differ from classical lipases in that they do not exhibit interfacial activation; they are active on soluble as well as on emulsified triglycerides. Cutinases therefore establish a bridge between esterases and lipases. We report here the three-dimensional structure of a recombinant cutinase from F. solani pisi, expressed in Escherichia coli. Cutinase is an alpha-beta protein; the active site is composed of the triad Ser 120, His 188 and Asp 175. Unlike other lipases, the catalytic serine is not buried under surface loops, but is accessible to solvent. This could explain why cutinase does not display interfacial activation.

Fusarium solani cutinase is a lipolytic enzyme with a catalytic serine accessible to solvent.,Martinez C, De Geus P, Lauwereys M, Matthyssens G, Cambillau C Nature. 1992 Apr 16;356(6370):615-8. PMID:1560844^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Chen S, Tong X, Woodard RW, Du G, Wu J, Chen J. Identification and characterization of bacterial cutinase. J Biol Chem. 2008 Sep 19;283(38):25854-62. PMID:18658138 doi:10.1074/jbc.M800848200
↑ Liu Z, Gosser Y, Baker PJ, Ravee Y, Lu Z, Alemu G, Li H, Butterfoss GL, Kong XP, Gross R, Montclare JK. Structural and functional studies of Aspergillus oryzae cutinase: enhanced thermostability and hydrolytic activity of synthetic ester and polyester degradation. J Am Chem Soc. 2009 Nov 4;131(43):15711-6. PMID:19810726 doi:10.1021/ja9046697
↑ Martinez C, Nicolas A, van Tilbeurgh H, Egloff MP, Cudrey C, Verger R, Cambillau C. Cutinase, a lipolytic enzyme with a preformed oxyanion hole. Biochemistry. 1994 Jan 11;33(1):83-9. PMID:8286366
↑ Nicolas A, Egmond M, Verrips CT, de Vlieg J, Longhi S, Cambillau C, Martinez C. Contribution of cutinase serine 42 side chain to the stabilization of the oxyanion transition state. Biochemistry. 1996 Jan 16;35(2):398-410. PMID:8555209 doi:http://dx.doi.org/10.1021/bi9515578
↑ Martinez C, De Geus P, Lauwereys M, Matthyssens G, Cambillau C. Fusarium solani cutinase is a lipolytic enzyme with a catalytic serine accessible to solvent. Nature. 1992 Apr 16;356(6370):615-8. PMID:1560844 doi:http://dx.doi.org/10.1038/356615a0