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- ************************
- * Dehydrins signatures *
- ************************
-
- A number of proteins are produced by plants that experience water-stress.
- Water-stress takes place when the water available to a plant falls below a
- critical level. The plant hormone absisic acid (ABA) appears to modulate the
- response of plant to water-stress. Proteins that are expressed during water-
- stress are called dehydrins [1,2] or LEA group 2 proteins [3]. The proteins
- that belong to this family are listed below.
-
- - Arabidopsis thaliana XERO, RAB18 and COR47.
- - Barley dehydrins B8, B9, B17, and B18.
- - Cotton LEA protein D-11.
- - Craterostigma plantagineum dessication-related proteins A and B.
- - Maize dehydrin M3 (RAB-17).
- - Pea dehydrins DHN1, DHN2, and DHN3.
- - Radish LEA protein.
- - Rice proteins RAB 16B, 16C, 16D, RAB21, and RAB25.
- - Tomato TAS14.
- - Wheat dehydrin RAB 15.
-
- Dehydrins share a number of structural features. One of the most notable
- features is the presence, in their central region, of a continuous run of
- five to nine serines followed by a cluster of charged residues. Such a region
- has been found in all known dehydrins so far with the exception of pea
- dehydrins. A second conserved feature is the presence of two copies of a
- lysine-rich octapeptide; the first copy is located just after the cluster
- of charged residues that follows the poly-serine region and the second copy
- is found at the C-terminal extremity. We have have derived signature patterns
- for both regions.
-
- -Consensus pattern: S(5)-E-x-[DE]-G-x-G-x(0,1)-[KR](4)
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for pea dehydrins and Arabidopsis COR47.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [KR]-[LIM]-K-[DE]-K-[LIM]-P-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: October 1993 / Patterns and text revised.
-
- [ 1] Close T.J., Kortt A.A., Chandler P.M.
- Plant Mol. Biol. 13:95-108(1989).
- [ 2] Robertson M., Chandler P.M.
- Plant Mol. Biol. 19:1031-1044(1992).
- [ 3] Dure L. III, Crouch M., Harada J., Ho T.-H. D., Mundy J., Quatrano R.,
- Thomas T., Sung Z.R.
- Plant Mol. Biol. 12:475-486(1989).
-