Cited by 47Plant nutrient uptake and metabolismGlycogen Storage Diseases and MyoclonusPlant Molecular Biology Research

The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.

Molecular cloning and characterization of two novel isoforms of the small subunit of ADPglucose pyrophosphorylase from sweet potato

Bae, J. M., Liu, J. R.·1997·Molecular and General Genetics MGG

Abstract

Two cDNA clones encoding two different ADPglucose pyrophosphorylase (AGPase) polypeptides designated IbAGP-sTL1 (sTL1) and IbAGP-sTL2 (sTL2) were isolated from sweet potato tuberous root and leaf libraries. The two are 84.1% and 90.6% identical at the nucleotide and amino acid sequence level, respectively. They showed higher homology with previously identified small AGPase subunit polypeptides than with large subunits, indicating that they belong to the class of small AGPase subunit polypeptides. Although both isoforms were expressed in the same organs of sweet potato, including tuberous root, leaf and stem tissues, the steady-state level of sTL1 transcripts was always higher than that of sTL2. Throughout the various developmental stages of leaves examined both isoforms were actively expressed and no significant changes in mRNA level were detected. In leaves, the level of sTL1 mRNA was increased enormously by treatment with exogenous sucrose and moderately by growth under constant light, whereas the transcript level of sTL2 remained almost unaffected, indicating that sTL1 but not sTL2 is a sucrose-inducible and light-responsive gene of starch biosynthesis. sTL1 is the only sucrose-inducible gene encoding a small AGPase subunit so far characterized from higher plants. Genomic Southern analysis suggests that the two isoforms originate from different loci in the sweet potato genome.

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Crossref · 10.1007/s004380050406

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  • In sweet potato, the key enzymes involved in starch biosynthesis, including AGPase, GBSS, ISA, SBE, SP, and SSS, and their associated genes have been isolated and studied.

    “In sweet potato, the key enzymes involved in starch biosynthesis, including ADP-glucose pyrophosphorylase (AGPase, EC 2.7.7.27), granule-bound starch synthases (GBSS, EC 2.4.1.21), isoamylase (ISA, EC 3.2.1.68), starch-branching enzyme (SBE, EC 2.4.1.18), starch phosphorylase (SP, EC 2.4.1.1), and soluble starch synthase (SSS, EC 2.4.1.21), and their associated genes have been isolated and studied”

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Metadata

Authors
Bae, J. M., & Liu, J. R.
Affiliations
Korea Research Institute of Bioscience and Biotechnology (KR)
Venue
Molecular and General Genetics MGG
Published
1997-03
Volume
254
Issue
2
Pages
179-185
ISSN
  • 0026-8925 (ISSN-L)
  • 1432-1874
OpenAlex
W2009829708
Cited by
47
References
32
Citations by year
2023: 1 · 2022: 2 · 2020: 1 · 2019: 1 · 2017: 2 · 2015: 3 · 2013: 2 · 2012: 2
FWCI
3.83
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular and General Genetics MGG (publishedVersion)
  • PubMed (publishedVersion)
  • KRIBB Repository (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Glycogen Storage Diseases and Myoclonus
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords
ADP-glucose pyrophosphorylase, Ipomoea batatas, starch biosynthesis, gene expression, sucrose, tuberous roots, leaf development, cDNA cloning, gene family
MeSH terms
Amino Acid Sequence, Base Sequence, Cloning, Molecular, Isoenzymes, Light, Molecular Sequence Data, Nucleotidyltransferases, Protein Conformation, Sucrose, Vegetables, Gene Expression Regulation, Enzymologic, Polymerase Chain Reaction, Genes, Plant, Sequence Homology, Amino Acid, DNA Primers, DNA, Complementary, Gene Expression Regulation, Plant, DNA, Plant, Glucose-1-Phosphate Adenylyltransferase

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