4glk

Structure and activity of AbiQ, a lactococcal anti-phage endoribonuclease belonging to the type-III toxin-antitoxin system

spinqualitylabelsall models 4glk, resolution 2.16Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4glk is a 1 chain structure with sequence from Lactococcus lactis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.16Å Ligands: GOL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function ABIQ_LACLL Toxic component of a type III toxin-antitoxin (TA) system. An endoribonuclease that is probably sequence-specific. It is neutralized by its cognate antitoxin RNA AntiQ, which has 2.8 35 nucleotide-long repeats. Cannot be cloned in L.lactis subsp. cremoris strain NZ9000 in the absence of the antitoxin gene; expression in strain NZ9000 even in the presence of antiQ inhibits growth in a bacteriostatic fashion (PubMed:23279123). Confers resistance to 936 and c2 phages but not P335 phages in L.lactis, causes an abortive infection (Abi phenotype). Viral DNA is replicated but not cleaved from its concatemeric form, while the viral major structural protein is produced normally in the presence of this protein (PubMed:9835558). Operon expression in E.coli confers resistance to 3 phages of the Myoviridae family (T4, RB69 and phage 2) and 1 of the Siphoviridae family (T5), but not other tested phages (T1, T3, lambda vir, HK97, Mu and pilH alpha). The presence of this operon in L.lactis subsp. lactis strain IL1403 during phage P008 infection alters the viral transcription profiles (PubMed:23813728).

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