SPR1 cDNA ORF clone, Arabidopsis thaliana(thale cress)

Sequence and analysis of chromosome 2 of the plant Arabidopsis thaliana.
Lin X, Kaul S, Rounsley S, Shea TP, Benito MI, Town CD, Fujii CY, Mason T, Bowman CL, Barnstead M, Feldblyum TV, Buell CR, Ketchum KA, Lee J, Ronning CM, Koo HL, Moffat KS, Cronin LA, Shen M, Pai G, Van Aken S, Umayam L, Tallon LJ, Gill JE, Adams MD, Carrera AJ, Creasy TH, Goodman HM, Somerville CR, Copenhaver GP, Preuss D, Nierman WC, White O, Eisen JA, Salzberg SL, Fraser CM, Venter JC
Nature402(6763)761-8(1999 Dec)

SPR1 and EB1b have complex interactions as they load onto microtubule plus ends and direct polar cell expansion and organ growth in response to directional cues.
Title: The microtubule plus-end tracking proteins SPR1 and EB1b interact to maintain polar cell elongation and directional organ growth in Arabidopsis.

Salt stress accelerates the 26S proteasome-dependent degradation of SPR1 and facilitates microtubule disassembly and promotes salt stress tolerance.
Title: Salt stress-induced disassembly of Arabidopsis cortical microtubule arrays involves 26S proteasome-dependent degradation of SPIRAL1.

these observations suggest that SPR1 and SP1Ls act redundantly in maintaining the cortical microtubule organization essential for anisotropic cell growth
Title: Role of the SPIRAL1 gene family in anisotropic growth of Arabidopsis thaliana.

Observations suggest that SPR1 is involved in microtubule polymerization dynamics and/or guidance, which in turn influences touch-induced directional cell expansion and axial twisting. [SPIRAL1]
Title: The Arabidopsis sku6/spiral1 gene encodes a plus end-localized microtubule-interacting protein involved in directional cell expansion.