Evolutionary implications of sequential homologies among members of the trypsin/a-amylase inhibitors family (CM-proteins) in wheat and barley

Barber, Domingo and Sánchez-Monge Laguna de Rins, Rosa and García Olmedo, Francisco and Salcedo Duran, Gabriel and Mendez, Enrique (1985). Evolutionary implications of sequential homologies among members of the trypsin/a-amylase inhibitors family (CM-proteins) in wheat and barley. "Biochimica et Biophysica Acta", v. 873 (n. 1); pp. 147-151. ISSN 0167-4838. https://doi.org/10.1016/0167-4838(86)90201-3.

Description

Title: Evolutionary implications of sequential homologies among members of the trypsin/a-amylase inhibitors family (CM-proteins) in wheat and barley
Author/s:
  • Barber, Domingo
  • Sánchez-Monge Laguna de Rins, Rosa
  • García Olmedo, Francisco
  • Salcedo Duran, Gabriel
  • Mendez, Enrique
Item Type: Article
Título de Revista/Publicación: Biochimica et Biophysica Acta
Date: September 1985
ISSN: 0167-4838
Volume: 873
Subjects:
Freetext Keywords: Amino acid sequence homology; Multi-gene family; Trypsin inhibitor; α-Amylase inhibitor; (Cereal endosperm)
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The N-terminal amino acid sequence of four members of the trypsin/α-amylase inhibitor family in wheat, CM1, CM2, CM16 and CM17, has been investigated for 27–29 cycles by automated sequencing procedure. None of the proteins showed inhibitory activity against trypsin or α-amylases from different sources. The N-terminal sequences of these four proteins present a high degree of homology to each other as well as to those reported for other members of the same family in wheat and barley. Such homology is higher between a given protein and a second one associated with a different genome than between that protein and any other encoded in the same genome, indicating that most of the dispersion of the corresponding multi-gene family over several chromosomes took place before the wheat/barley evolutionary branching-out

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