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Title: Transcriptional regulation of NAD metabolism in bacteria: NrtR family of Nudix-related regulators

Journal Article · · Nucleic Acids Research
DOI:https://doi.org/10.1093/nar/gkn047· OSTI ID:1625439
 [1];  [2];  [3];  [4];  [5];  [6];  [3]
  1. Burnham Inst. for Medical Research, La Jolla, CA (United States); Russian Academy of Sciences (RAS), Moscow (Russian Federation). Inst. for Information Transmission Problems
  2. Universita Politecnica delle Marche, Ancona (Italy). Istituto di Biotecnologie Biochimiche
  3. Universita Politecnica delle Marche, Ancona (Italy). Istituto di Biotecnologie Biochimiche
  4. Burnham Inst. for Medical Research, La Jolla, CA (United States); Universita Politecnica delle Marche, Ancona (Italy). Istituto di Biotecnologie Biochimiche
  5. Univ. of Texas Southwestern Medical Center, Dallas, TX (United States). Dept. of Biochemistry
  6. Burnham Inst. for Medical Research, La Jolla, CA (United States); Fellowship for Interpretation of Genomes, Burr Ridge, IL (United States)

A novel family of transcription factors responsible for regulation of various aspects of NAD synthesis in a broad range of bacteria was identified by comparative genomics approach. Regulators of this family (here termed NrtR for Nudix-related transcriptional regulators), currently annotated as ADPribose pyrophosphatases from the Nudix family, are composed of an N-terminal Nudix-like effector domain and a C-terminal DNA-binding HTH-like domain. NrtR regulons were reconstructed in diverse bacterial genomes by identification and comparative analysis of NrtR-binding sites upstream of genes involved in NAD biosynthetic pathways. The candidate NrtR-binding DNA motifs showed significant variability between microbial lineages, although the common consensus sequence could be traced for most of them. Bioinformatics predictions were experimentally validated by gel mobility shift assays for two NrtR family representatives. ADP-ribose, the product of glycohydrolytic cleavage of NAD, was found to suppress the in vitro binding of NrtR proteins to their DNA target sites. In addition to a major role in the direct regulation of NAD homeostasis, some members of NrtR family appear to have been recruited for the regulation of other metabolic pathways, including sugar pentoses utilization and biogenesis of phosphoribosyl pyrophosphate. This work and the accompanying study of NiaR regulon demonstrate significant variability of regulatory strategies for control of NAD metabolic pathway in bacteria.

Research Organization:
Burnham Institute for Medical Research, La Jolla, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; National Institutes of Health (NIH)
Grant/Contract Number:
FG02-07ER64384; 1-R01-AI066244-01A2
OSTI ID:
1625439
Journal Information:
Nucleic Acids Research, Vol. 36, Issue 6; ISSN 0305-1048
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (18)

RegPrecise 3.0 – A resource for genome-scale exploration of transcriptional regulation in bacteria journal January 2013
Towards environmental systems biology of Shewanella journal July 2008
Transcriptional reprogramming and phenotypic switching associated with the adaptation of Lactobacillus plantarum C2 to plant niches journal June 2016
Transcriptional regulation of gene expression in Corynebacterium glutamicum : the role of global, master and local regulators in the modular and hierarchical gene regulatory network journal September 2010
Modular engineering to increase intracellular NAD(H/+) promotes rate of extracellular electron transfer of Shewanella oneidensis journal September 2018
Essential role of B ordetella NadC in a quinolinate salvage pathway for NAD biosynthesis journal November 2016
A single regulator NrtR controls bacterial NAD+ homeostasis via its acetylation journal October 2019
Structure and Function of an ADP-Ribose-Dependent Transcriptional Regulator of NAD Metabolism journal July 2009
Transcriptional regulation of NAD metabolism in bacteria: genomic reconstruction of NiaR (YrxA) regulon journal February 2008
RegPrecise: a database of curated genomic inferences of transcriptional regulatory interactions in prokaryotes journal October 2009
A novel transcriptional regulator of L-arabinose utilization in human gut bacteria journal October 2015
Comparative genomics and evolution of transcriptional regulons in Proteobacteria journal July 2016
Functional Promiscuity of Homologues of the Bacterial ArsA ATPases journal January 2010
Polysaccharides utilization in human gut bacterium Bacteroides thetaiotaomicron: comparative genomics reconstruction of metabolic and regulatory networks journal January 2013
Genomics-Guided Analysis of NAD Recycling Yields Functional Elucidation of COG1058 as a New Family of Pyrophosphatases journal June 2013
Comparative Genomics of Transcriptional Regulation of Methionine Metabolism in Proteobacteria journal November 2014
Structural and Enzymatic Characterization of a Nucleoside Diphosphate Sugar Hydrolase from Bdellovibrio bacteriovorus journal November 2015
Niacin-mediated Gene Expression and Role of NiaR as a Transcriptional Repressor of niaX, nadC, and pnuC in Streptococcus pneumoniae journal March 2017

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