A chenopod extensin lacks repetitive tetrahydroxyproline blocks

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Plant Physiology; (USA)

DOI:https://doi.org/10.1104/pp.92.2.327· OSTI ID:5957757

Li, Xiongbiao; Kieliszewski, M; Lamport, D T.A. ^[1]

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1. Michigan State Univ., East Lansing (USA)

An extensin isolated from sugar beet (Beta vulgaris) cell suspension cultures fulfills all criteria for membership of the extensin family save one, notably, lack of the diagnostic pentamer Ser-Hyp-Hyp-Hyp-Hyp. However, sequence analysis of the major tryptic peptides shows that sugar beet extensin shares a motif in common with tomato extensin P1 but differs by the position of an insertion sequence (X) or (Y) which, in sugar beet, splits the tetrahydroxyproline block: Ser-Hyp-Hyp-(X)-Hyp-Hyp-Thr-Hyp-Val-Tyr-Lys, where (X) is (Val-His-Glu/Lys-Tyr-Pro), while in tomato the insertion sequence (Y) = (Val-Lys-Pro-Tyr-His-Pro) and, when it occurs, immediately follows the tetrahydroxyproline block: Ser-Hyp-Hyp-Hyp-Hyp-(Y)-Thr-Hyp-Val-Tyr-Lys. Based on these data were reinterpret three highly repetitive cDNA sequences, including nodulin N75 from soybean and wound-induced P33 of carrot, as extensins with split tetra(hydroxy)proline blocks.

• OSTI ID: 5957757
• Journal Information: Plant Physiology; (USA), Vol. 92:2; ISSN 0032-0889
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
SUGAR BEETS
PHYSIOLOGY
CELL CULTURES
CHENOPODIACEAE
DNA SEQUENCING
HYDROXYPROLINE
AMINES
AMINO ACIDS
AZOLES
BEETS
CARBOXYLIC ACIDS
FOOD
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROXY ACIDS
MAGNOLIOPHYTA
MAGNOLIOPSIDA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PLANTS
PYRROLES
PYRROLIDINES
STRUCTURAL CHEMICAL ANALYSIS
VEGETABLES
551000* - Physiological Systems