BAM4 beta-amylase 4 [Arabidopsis thaliana (thale cress)] - Gene

Summary

Official Symbol: BAM4
Official Full Name: beta-amylase 4
Primary source: TAIR:AT5G55700
Locus tag: AT5G55700
See related: Araport:AT5G55700
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: beta-amylase 4; BETA-AMYLASE 6; BMY6; MDF20.14; MDF20_14
Summary: In vitro assay indicates no beta-amylase activity of BAM4. However mutation in BAM4 impairs starch breakdown. BAM4 may play a regulatory role.
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Chromosome 5 - NC_003076.8 Genomic Context describing neighboring genes

Go to nucleotide: Graphics FASTA GenBank

BAM4 is preferentially expressed in non-photosynthetic vascular tissue, so revealing a potentially greater level of complexity in the control of starch breakdown than had previously been recognised
Title: The gene encoding the catalytically inactive beta-amylase BAM4 involved in starch breakdown in Arabidopsis leaves is expressed preferentially in vascular tissues in source and sink organs.
BAM4 facilitates starch breakdown by a mechanism involving direct interaction with starch or other alpha-1,4-glucan.
Title: Catalytically-inactive beta-amylase BAM4 required for starch breakdown in Arabidopsis leaves is a starch-binding-protein.
data suggest that BAM4 facilitates or regulates starch breakdown and operates independently of BAM1 and BAM3
Title: Beta-AMYLASE4, a noncatalytic protein required for starch breakdown, acts upstream of three active beta-amylases in Arabidopsis chloroplasts.

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

NM_001345148.1

Function	Evidence Code	Pubs
NOT enables beta-amylase activity	IDA Inferred from Direct Assay more info	PubMed
enables beta-amylase activity	IEA Inferred from Electronic Annotation more info

Process	Evidence Code	Pubs
acts_upstream_of_or_within starch catabolic process	IMP Inferred from Mutant Phenotype more info	PubMed

Component	Evidence Code	Pubs
located_in chloroplast	IDA Inferred from Direct Assay more info	PubMed
located_in extracellular region	ISM Inferred from Sequence Model more info

NP_001318804.1

beta-amylase 4 (BAM4); CONTAINS InterPro DOMAIN/s: 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).

NP_568829.2

beta-amylase 4 (BAM4); CONTAINS InterPro DOMAIN/s: 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 805 Blast hits to 802 proteins in 156 species: Archae - 0; Bacteria - 86; Metazoa - 0; Fungi - 0; Plants - 654; Viruses - 0; Other Eukaryotes - 65 (source: NCBI BLink).