Cited by 688Plant Molecular Biology ResearchGenomics and Chromatin DynamicsPlant nutrient uptake and metabolism

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Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5′ upstream regions of genes coding for sporamin and β-amylase from sweet potato

Ishiguro, Sumie, Nakamura, Kenzo·1994·Molecular and General Genetics MGG

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Abstract

We isolated a cDNA encoding a DNA-binding protein, SPF1, of sweet potato that binds to the SP8a (ACTGTGTA) and SP8b (TACTATT) sequences present in the 5' upstream regions of three different genes coding for sporamin and beta-amylase of tuberous roots. SPF1 comprises 549 amino acids and is enriched in both basic and acidic residues. The amino acid sequence of SPF1 shows no significant homology to any known protein sequences, suggesting that it may represent a new class of DNA-binding protein. Binding studies with 35S-labeled SPF1, synthesized in vitro, and synthetic DNA fragments indicated that, although SPF1 binds to both the SP8a and SP8b sequences, it binds much more strongly to SP8a than to SP8b. SPF1 bound to the SP8a sequence as a monomer. The DNA-binding domain of SPF1 was localized within the C-terminal half of this protein, and a 162-amino acid fragment of SPF1 (Met310-Arg472) showed DNA-binding activity with no change in target sequence specificity. This fragment contains a region enriched in basic amino acids adjacent to a highly acidic stretch. A sequence which is highly homologous to a 40-amino acid sequence in the basic region of the DNA-binding domain is duplicated in the N-terminal part of SPF1. The gene coding for SPF1 is present in one or a few copies per haploid genome and the SPF1 mRNA was detected in leaves, stems and tuberous roots of the sweet potato, in addition to petioles. The level of SPF1 mRNA in the petioles decreased when leaf-petiole cuttings were treated with sucrose to induce accumulation of sporamin and beta-amylase mRNAs.

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Additional file 3 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress
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Additional file 1 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress
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Additional file 2 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress
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Additional file 4 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 14 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 2 of GhWRKY1-like, a WRKY transcription factor, mediates drought tolerance in Arabidopsis via modulating ABA biosynthesis
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Additional file 12 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 5 of Identification of WRKY transcription factor family genes in Pinus massoniana Lamb. and their expression patterns and functions in response to drought stress
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Additional file 10 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 3 of Identification of WRKY transcription factor family genes in Pinus massoniana Lamb. and their expression patterns and functions in response to drought stress
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Additional file 6 of Identification of WRKY transcription factor family genes in Pinus massoniana Lamb. and their expression patterns and functions in response to drought stress
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Additional file 1 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 11 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
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Additional file 13 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.26671602
Additional file 2 of Overexpression of a WRKY transcription factor McWRKY57-like from Mentha canadensis L. enhances drought tolerance in transgenic Arabidopsis
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Additional file 2 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.25052504
Additional file 7 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.26671584
Additional file 4 of Identification of WRKY transcription factor family genes in Pinus massoniana Lamb. and their expression patterns and functions in response to drought stress
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Additional file 1 of GhWRKY1-like, a WRKY transcription factor, mediates drought tolerance in Arabidopsis via modulating ABA biosynthesis
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Additional file 9 of Genome-wide identification and functional characterization of the Camelina sativa WRKY gene family in response to abiotic stress
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Additional file 6 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.26671581
Additional file 9 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.26671590
Additional file 8 of Genomic characterization of WRKY transcription factors related to secoiridoid biosynthesis in Gentiana macrophylla
Yin, Y., Fu, H., Mi, F., Yang, Y., Wang, Y., Li, Z., He, Y., & Yue, Z. (2024) · Figshare · doi:10.6084/m9.figshare.26671587
Additional file 1 of Identification of WRKY transcription factor family genes in Pinus massoniana Lamb. and their expression patterns and functions in response to drought stress
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Authors: Ishiguro, S., & Nakamura, K.
Affiliations: Nagoya University (JP)
ORCID: Ishiguro, Sumie
Venue: Molecular and General Genetics MGG
Publisher: Springer Science and Business Media LLC
Published: 1994-11
Volume: 244
Issue: 6
Pages: 563-571
ISSN: 0026-8925 (ISSN-L)
1432-1874
DOI: 10.1007/bf00282746
OpenAlex: W2034709873
Cited by: 664
References: 19
Citations by year: 2026: 32 · 2025: 61 · 2024: 45 · 2023: 51 · 2022: 62 · 2021: 46 · 2020: 49 · 2019: 37 · 2018: 17 · 2017: 29 · 2016: 37 · 2015: 25 · 2014: 26 · 2013: 21 · 2012: 19
FWCI: 3.96
Type: journal article
Language: en
Open access: closed
Licence: www.springer.com/tdm (tdm)
Locations: Molecular and General Genetics MGG (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant nutrient uptake and metabolism
Keywords: DNA-binding proteins, transcription factors, sporamin, β-amylase, Ipomoea batatas, DNA-binding domain, sucrose induction, tuberous roots, gene expression regulation
MeSH terms: Amino Acid Sequence, Base Sequence, beta-Amylase, Cloning, Molecular, DNA-Binding Proteins, Molecular Sequence Data, Plant Proteins, Vegetables, Genes, Plant, DNA, Complementary, DNA, Plant

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Characterization of a cDNA encoding a novel DNA-binding protein, SPF1, that recognizes SP8 sequences in the 5′ upstream regions of genes coding for sporamin and β-amylase from sweet potato

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