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Dual assay for MCLV3 activity reveals structure-activity relationship of CLE peptides.

Abstract：

:The dodecapeptide MCLV3 is a functional peptide, derived from the CLV3 precursor protein, which is a candidate ligand of the CLV1/CLV2 receptor complex that restricts the stem cell population in the shoot apical meristem (SAM). MCLV3 can induce shoot and root meristem consumption, the typical phenotype of transgenic plants overexpressing CLV3. We investigated the bioactivities of a series of alanine-substituted MCLV3 and related peptides on the root growth of Arabidopsis. The structure-activity relationship (SAR) of MCLV3 had high similarity with that of tracheary element differentiation inhibitory factor (TDIF). We also evaluated the binding activities of the peptides by a competitive receptor binding assay using tritiated MCLV3 and the membrane fraction of a tobacco BY-2 cell line overexpressing the MCLV3 ectodomain. This dual assay, combining a biological and receptor binding assay for evaluating the activities of MCLV3-related peptides, uncovered the SAR of MCLV3, and indicated that the terminal residues play critical roles in exerting its activity and are important for specific binding to the receptor, CLV1.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Kondo T,Nakamura T,Yokomine K,Sakagami Y

doi

10.1016/j.bbrc.2008.09.139

subject

Has Abstract

pub_date

2008-12-05 00:00:00

pages

312-6

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(08)01959-1

journal_volume

377

pub_type

杂志文章

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