home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Danny Amor's Online Library
/
Danny Amor's Online Library - Volume 1.iso
/
bbs
/
misc
/
prosite.lha
/
DATA
/
PDOC00285
< prev
next >
Wrap
Text File
|
1995-07-26
|
2KB
|
51 lines
************************
* 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).