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    BAM1 beta-amylase 1 [ Arabidopsis thaliana (thale cress) ]

    Gene ID: 821975, updated on 7-Sep-2023

    Summary

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    Gene symbol
    BAM1
    Gene description
    beta-amylase 1
    Primary source
    Araport:AT3G23920
    Locus tag
    AT3G23920
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Arabidopsis thaliana (ecotype: Columbia)
    Lineage
    Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae; rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis
    Also known as
    AtBAM1; beta-amylase 1; BETA-AMYLASE 7; BMY7; TR-BAMY
    Summary
    Encodes a chloroplast beta-amylase. Is necessary for leaf starch breakdown in the absence of BAM3.
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    Genomic context

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    See BAM1 in Genome Data Viewer
    Location:
    chromosome: 3
    Exon count:
    4
    Sequence:
    Chromosome: 3; NC_003074.8 (8641181..8644449)

    Chromosome 3 - NC_003074.8Genomic Context describing neighboring genes Neighboring gene RNA recognition motif (RRM)-containing protein Neighboring gene reverse transcriptase-like protein Neighboring gene troponin T, skeletal protein Neighboring gene dehydratase family

    Genomic regions, transcripts, and products

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    Genomic Sequence:
    NC_003074.8

    Go to nucleotide: Graphics FASTA GenBank

    Bibliography

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    Related articles in PubMed

    1. A dominant mutation in β-AMYLASE1 disrupts nighttime control of starch degradation in Arabidopsis leaves. Feike D, et al. Plant Physiol, 2022 Mar 28. PMID 34958379, Free PMC Article
    2. β-amylase 1 (BAM1) degrades transitory starch to sustain proline biosynthesis during drought stress. Zanella M, et al. J Exp Bot, 2016 Mar. PMID 26792489
    3. ß-amylase1 mutant Arabidopsis plants show improved drought tolerance due to reduced starch breakdown in guard cells. Prasch CM, et al. J Exp Bot, 2015 Sep. PMID 26139825, Free PMC Article
    4. Redox regulation of a novel plastid-targeted beta-amylase of Arabidopsis. Sparla F, et al. Plant Physiol, 2006 Jul. PMID 16698902, Free PMC Article
    5. Beta-AMYLASE4, a noncatalytic protein required for starch breakdown, acts upstream of three active beta-amylases in Arabidopsis chloroplasts. Fulton DC, et al. Plant Cell, 2008 Apr. PMID 18390594, Free PMC Article

    See all (8) citations in PubMed

    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?
    1. A dominant mutation in beta-AMYLASE1 disrupts nighttime control of starch degradation in Arabidopsis leaves.
      Title: A dominant mutation in β-AMYLASE1 disrupts nighttime control of starch degradation in Arabidopsis leaves.
    2. carbon skeletons deriving from BAM1 diurnal degradation of transitory starch support the biosynthesis of proline required to face the osmotic stress.
      Title: β-amylase 1 (BAM1) degrades transitory starch to sustain proline biosynthesis during drought stress.
    3. Drought tolerance of bam1 mutant plants is improved as compared with wild-type controls. There was a significant down-regulation of genes encoding aquaporins, auxin- and ethylene-responsive factors, and cell-wall modifying enzymes.
      Title: ß-amylase1 mutant Arabidopsis plants show improved drought tolerance due to reduced starch breakdown in guard cells.
    4. Consistent with thioredoxin-regulated beta-amylase redox dependency, total beta-amylase activity in Arabidopsis chloroplasts was partially redox regulated and required reducing conditions for full activation.
      Title: Redox regulation of a novel plastid-targeted beta-amylase of Arabidopsis.
    Submit: New GeneRIF Correction

    General gene information

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    Homology

    NM_113297.3

    Gene Ontology Provided by TAIR

    Function Evidence Code Pubs
    enables amylopectin maltohydrolase activity IEA
    Inferred from Electronic Annotation
    more info
    		  
    enables beta-amylase activity IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    Process Evidence Code Pubs
    acts_upstream_of_or_within response to water deprivation IEP
    Inferred from Expression Pattern
    more info
    		 PubMed 
    acts_upstream_of_or_within starch catabolic process IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    acts_upstream_of_or_within starch catabolic process IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    Component Evidence Code Pubs
    located_in extracellular region ISM
    Inferred from Sequence Model
    more info
    		  

    General protein information

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    Preferred Names
    beta-amylase 1
    NP_189034.1
    • beta-amylase 1 (BAM1); FUNCTIONS IN: beta-amylase activity; INVOLVED IN: response to water deprivation, starch catabolic process; LOCATED IN: cytosol, nucleus; EXPRESSED IN: 25 plant structures; EXPRESSED DURING: 15 growth stages; CONTAINS InterPro DOMAIN/s: Glycoside hydrolase, family 14, conserved site (InterPro:IPR018238), Glycoside hydrolase, family 14 (InterPro:IPR001554), Glycoside hydrolase, catalytic core (InterPro:IPR017853), Glycoside hydrolase, family 14B, plant (InterPro:IPR001371), Glycoside hydrolase, subgroup, catalytic core (InterPro:IPR013781); BEST Arabidopsis thaliana protein match is: chloroplast beta-amylase (TAIR:AT4G17090.1); Has 845 Blast hits to 843 proteins in 168 species: Archae - 0; Bacteria - 89; Metazoa - 0; Fungi - 0; Plants - 691; Viruses - 0; Other Eukaryotes - 65 (source: NCBI BLink).

    NCBI Reference Sequences (RefSeq)

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    Genome Annotation

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference assembly

    Genomic

    1. NC_003074.8 Reference assembly

      Range
      8641181..8644449
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_113297.3 → NP_189034.1  beta-amylase 1 [Arabidopsis thaliana]

      See identical proteins and their annotated locations for NP_189034.1

      Status: REVIEWED

      UniProtKB/Swiss-Prot
      Q0WWR5, Q9LIR6
      UniProtKB/TrEMBL
      A0A178VNG4, A0A5S9XFL1
      Conserved Domains (1) summary
      PLN00197
      Location:1 → 575
      PLN00197; beta-amylase; Provisional
    Nucleotide Protein
    Heading Accession and Version
    Protein Accession Links
    GenPept Link UniProtKB Link
    Q9LIR6.1

    Gene LinkOut

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