PAXNEB or PAX6 neighbour is found in several eukaryotic organisms. PAXNED is an RNA polymerase II Elongator protein subunit [2]. It is part of the HAP subcomplex of Elongator, which is a six-subunit component of the RNA polymerase II holoenzyme. The HAP subcomplex is required for Elongator structural integrity and histone acetyltransferase activity [2]. This protein family has a P-loop-like motif and adopts a RecA-ATPase-like fold, lacking the conserved sequence signature of ATPases [4].

1: Characterization of a novel gene adjacent to PAX6, revealing synteny conservation with functional significance. Kleinjan DA, Seawright A, Elgar G, van Heyningen V; Mamm Genome 2002;13:102-107. PMID:11889558

2: Characterization of a six-subunit holo-elongator complex required for the regulated expression of a group of genes in Saccharomyces cerevisiae. Krogan NJ, Greenblatt JF; Mol Cell Biol 2001;21:8203-8212. PMID:11689709

3: The Elongator subcomplex Elp456 is a hexameric RecA-like ATPase. Glatt S, Letoquart J, Faux C, Taylor NM, Seraphin B, Muller CW; Nat Struct Mol Biol. 2012;19:314-320. PMID:22343726

4: Crystal structure of elongator subcomplex Elp4-6. Lin Z, Zhao W, Diao W, Xie X, Wang Z, Zhang J, Shen Y, Long J; J Biol Chem. 2012;287:21501-21508. PMID:22556426