Project description:Protein extract from symbiontic Burkholderia Kirkii (3 replicates: A,B,C): each fractionated by SDS-PAGE and digested using Trypsin, each fraction measured twice in LC-MSMS, once in discovery mode and once using an exclusion list based on first run. Mass spectra were searched against a protein sequence database containing products of both predicted protein coding genes and pseudogenes for B. kirkii, genes predicted by the Prodigal software, genes predicted by in-house software, P. kirkii chloroplastic proteins, as well as protein sequences of 256 common contaminants. We used Mascot search engine (version 2.3.0) with the following search parameters: Carbamidomethylation was set as a fixed modification on all Cysteines, oxidation of Methionines, deamidation of Asparagines and Glutamines, as well as cyclization of N-terminal Glutamines were considered as optional modifications. Precursor ion mass tolerance was set to 10 ppm, fragment ion mass tolerance was set to 0.8 Da, and the automatic decoy search option was enabled. Spectra were searched for a match to fully-tryptic and semi-tryptic peptides with up to two missed cleavage sites. The built-in version of Mascot Percolator was used to improve the peptide spectrum match (PSM) scores. Peptides were assessed with the PeptideClassifier software. Additional genome annotation is held at ENA under the accession: WGS project CAFE00000000.

2013-07-18 | PXD000147 | Pride

Candidatus Paraburkholderia kirkii UZHbot1

Project description:Genome sequencing of Candidatus Burkholderia kirkii UZHbot1, obligate symbiont of Rubiaceae

| PRJNA69825 | ENA

Candidatus Paraburkholderia kirkii strain:UZHbot2

Project description:Candidatus Paraburkholderia kirkii strain:UZHbot2 Genome sequencing and assembly

| PRJNA253356 | ENA

The Genome Sequence of Gossypioides kirkii Illustrates a Descending Dysploidy in Plants.

Project description:One of the extraordinary aspects of plant genome evolution is variation in chromosome number, particularly that among closely related species. This is exemplified by the cotton genus (Gossypium) and its relatives, where most species and genera have a base chromosome number of 13. The two exceptions are sister genera that have n = 12 (the Hawaiian Kokia and the East African and Madagascan Gossypioides). We generated a high-quality genome sequence of Gossypioides kirkii (n = 12) using PacBio, Bionano, and Hi-C technologies, and compared this assembly to genome sequences of Kokia (n = 12) and Gossypium diploids (n = 13). Previous analysis demonstrated that the directionality of their reduced chromosome number was through large structural rearrangements. A series of structural rearrangements were identified comparing the de novo G. kirkii genome sequence to genome sequences of Gossypium, including chromosome fusions and inversions. Genome comparison between G. kirkii and Gossypium suggests that multiple steps are required to generate the extant structural differences.

| S-EPMC6890844 | biostudies-literature

A New Benzopyranyl Cadenane Sesquiterpene and Other Antiplasmodial and Cytotoxic Metabolites from Cleistochlamys kirkii.

Project description:Phytochemical investigations of ethanol root bark and stem bark extracts of Cleistochlamys kirkii (Benth.) Oliv. (Annonaceae) yielded a new benzopyranyl cadinane-type sesquiterpene (cleistonol, 1) alongside 12 known compounds (2-13). The structures of the isolated compounds were established from NMR spectroscopic and mass spectrometric analyses. Structures of compounds 5 and 10 were further confirmed by single crystal X-ray crystallographic analyses, which also established their absolute stereochemical configuration. The ethanolic crude extract of C. kirkii root bark gave 72% inhibition against the chloroquine-sensitive 3D7-strain malaria parasite Plasmodium falciparum at 0.01 μg/mL. The isolated metabolites dichamanetin, (E)-acetylmelodorinol, and cleistenolide showed IC50 = 9.3, 7.6 and 15.2 μM, respectively, against P. falciparum 3D7. Both the crude extract and the isolated compounds exhibited cytotoxicity against the triple-negative, aggressive breast cancer cell line, MDA-MB-231, with IC50 = 42.0 μg/mL (crude extract) and 9.6-30.7 μM (isolated compounds). Our findings demonstrate the potential applicability of C. kirkii as a source of antimalarial and anticancer agents.

| S-EPMC6695775 | biostudies-literature

Project description:Gossypioides kirkii and Kokia drynarioides genome sequencing

| PRJNA400144 | ENA

Tbx6b ChIP-chip on Ciona intestinalis embryo (early gastrula)

Project description:A genomic overview of in vivo binding of a transcription factor Tbx6b in the ascidian early gastrula embryo.

2010-03-09 | GSE17694 | GEO