Annotations: 6YGE

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF14021	Tuberculosis necrotizing toxin (TNT)	Tuberculosis necrotizing toxin	This is the C-terminal domain secreted by Mycobacterium tuberculosis (Mtb). It induces necrosis of infected cells to evade immune responses. Mtb utilizes the protein CpnT to kill human macrophages by secreting its C-terminal domain (CTD), named tuber ...	This is the C-terminal domain secreted by Mycobacterium tuberculosis (Mtb). It induces necrosis of infected cells to evade immune responses. Mtb utilizes the protein CpnT to kill human macrophages by secreting its C-terminal domain (CTD), named tuberculosis necrotizing toxin (TNT) that induces necrosis. It acts as a NAD+ glycohydrolase which hydrolyzes the essential cellular coenzyme NAD+ in the cytosol of infected macrophages resulting in necrotic cell death [1]. CpnT transports its toxic CTD from the cell surface of M. tuberculosis by proteolytic cleavage, where the toxin is cleaved to induce host cell death [2]. Structural analysis determined that the TNT core contains only six beta-strands as opposed to seven found in all known NAD+-utilizing toxins, and is significantly smaller, with only two short alpha-helices and two 3/10 helices. Furthermore, the putative NAD+ binding pocket identified Q822, Y765 and R757 as residues possibly involved in NAD+-binding and hydrolysis based on similar positions of catalytic amino acids of ADP-ribosylating toxins. While glutamine 822 residue was detected to be highly conserved among TNT homologs [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	AfNADase	cation binding ion binding binding metal ion binding small molecule binding hydrolase activity, acting on glycosyl bonds NADP+ nucleosidase activity hydrolase activity hydrolase activity, hydrolyzing N-glycosyl compounds catalytic activity	-	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR053024	Fungal Surface Nicotinamide Adenine Dinucleotide Glycohydrolase	Family
A [auth B], B [auth A]	IPR025331	Tuberculosis necrotizing toxin	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.