Very recently, however, APs lacking a propart segment have been described from marine bacteria [ 26] and fungi [ 25], hence this unusual architecture of the PxAP6 and PxAP7 polypeptides in Phytophthora species is not without precedent.
Although α-linked xylose is a major constituent of the hemicelluloses of land plants, few secreted α-xylosidases have been described from fungi or bacteria.
Recently, two other types of Hint related domains have been described, primarily from bacteria, that have been named bacterial intein-like proteins (BIL) type A and B [ 21, 33].
Also, antibiotic-dependent strains have been described for bacteria isolated from laboratories [ 36, 37] and clinics [ 38].
Recently, a colonial, sessile folliculid ciliate with endo- and ectosymbiotic bacteria was described from Juan de Fuca Ridge [79] and was also present in our samples from EPR.
Although male-killing bacteria have been described from diverse taxa, including Wolbachia, Spiroplasma, Rickettsia and Arsenophonous[ 17- 20], little is known about the mechanism of male-killing in any of these systems.
Indeed, a mannose-binding lectin has recently been described from A. millepora which binds both bacteria and Symbiodinium and may therefore have roles in both immunity and symbiosis [ 14] A search for genes encoding lectin domains in clusters II, III and IV identified six unigenes, two of which, A036-E7 and A049-E7, have significant overall similarity to a haemolytic lectin from sea cucumber.
An illuminating example is provided by the bacterium Biostraticola tofi, described from water biofilms.
Here, we determined RETA to be part of a clade comprising poorly described bacteria from species of coral (Gorgonia ventalina and Montastraea faveolata) and sponge (Cymbastela concentrica) (Revetta et al. 2010, 2011; Sunagawa et al. 2010), consistent with the aquatic habitat of T. adhaerens.
Despite the presence of noncanonical residues in its active site, one report describes Pop2 purified from bacteria as having 3′ exonuclease in vitro (Thore et al. 2003).
