As an in vitro model for type II human lung cancer, A549 cells resist cytotoxicity via phosphorylation of proteins as demonstrated by many studies. However, to date, no large-scale phosphoproteome investigation has been conducted on A549. Here, we performed a systematical analysis of the phosphoproteome of A549 by using mass spectrometry (MS)-based strategies. This investigation led to the identification of 337 phosphorylation sites on 181 phosphoproteins. Among them, 67 phosphoproteins and 230 phosphorylation sites identified appeared to be novel with no previous characterization in lung cancer.

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GE公司codelink芯片(这个破产品已经停产了)上的探针ID,需要转成别的ID,看了一些在线的转换ID工具,都不支持,探针ID基本上都只支持affy的。

想起了bioconductor里的biomaRt,这个包可以检索BioMart数据库,这个数据库里有N多种ID。试了一下,果然没问题。

#加载biomaRt包
library(biomaRt)

#选取数据库
ensembl = useMart("ensembl", dataset = "hsapiens_gene_ensembl")

#获取可供检索的attribute
attributes=listAttributes(mart=ensembl)

#看一下attributes里是否有codelink,得到以下的结果。
attributes[grep("codelink",attributes[,1]), ]

name description
21 codelink Codelink ID
#再搜一下其它我想要的ID

#读进含有codelink ID的文件。
mrna_id <- read.table("mrna_id.txt")

#进行ID映射。
idmap <- getBM(attributes=c("codelink","refseq_dna","external_gene_id",
                            "embl","hgnc_id","hgnc_symbol"), 
               filters ="codelink", values=mrna_id[,1],
               mart=ensembl,output="list")

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Author's picture

Guangchuang Yu

a senior-in-age-but-not-senior-in-knowledge bioinformatician

Postdoc researcher

Hong Kong