Project description:Centromeres are chromosomal regions that serve as platforms for kinetochore assembly and spindle attachments, ensuring accurate chromosome segregation during cell division. Despite functional conservation, centromeric sequences are diverse and usually repetitive across species, making them challenging to assemble and identify. Here, we describe centromeres in the model oomycete Phytophthora sojae by combining long-read sequencing-based genome assembly and chromatin immunoprecipitation for the centromeric histone CENP-A followed by high-throughput sequencing (ChIP-seq). P. sojae centromeres cluster at a single focus in the nucleus at different life stages and during nuclear division. We report a highly contiguous genome assembly of the P. sojae reference strain, which enabled identification of 15 highly enriched CENP-A binding regions as putative centromeres. By focusing on 10 intact regions, we demonstrate that centromeres in P. sojae are regional, spanning 211 to 356 kb. Most of these regions are transposon-rich, poorly transcribed, and lack the euchromatin mark H3K4me2 but are embedded within regions with the heterochromatin marks H3K9me3 and H3K27me3.

2020-01-07 | GSE143137 | GEO

Sphingomonas colocasiae strain:JCM 31229

Project description:Sphingomonas colocasiae strain:JCM 31229 Genome sequencing and assembly

| PRJNA758629 | ENA

Phytophthora cinnamomi strain:ST402 | breed:Phytophthora

Project description:Phytophthora cinnamomi strain:ST402 | breed:Phytophthora Genome sequencing and assembly

| PRJNA832078 | ENA

Phytophthora have distinct endogenous small RNA populations that include short interfering and microRNAs: Phytophthora infestans small RNA

Project description:Deep sequencing of small RNAs from three Phytophthora species, P. infestans, P. ramorum and P. sojae, was done to systematically analyze small RNA-generating components of Phytophthora genomes. We found that each species produces two distinct small RNA populations that are predominantly 21- or 25-nucleotides long. We present evidence that 25-nucleotide small RNAs are short-interfering RNAs that silence repetitive genetic elements. In contrast, 21-nucleotide small RNAs are associated with inverted repeats, including a novel microRNA family, and may function at the post-transcriptional level. Phytophthora infestans mycelium small RNAs were sequenced and aligned to the P. infestans genome for analysis.

2013-10-21 | E-GEOD-50030 | biostudies-arrayexpress

Phytophthora

Project description:Phytophthora Genome sequencing and assembly

| PRJNA391273 | ENA

Phytophthora lateralis strain:SMSTG

Project description:Phytophthora lateralis strain:SMSTG Genome sequencing and assembly

| PRJNA184360 | ENA