Protein identification by 3D OrbiSIMS to facilitate in situ imaging and depth profiling.
Protein identification by 3D OrbiSIMS to facilitate in situ imaging and depth profiling.
复制标题
通过3D OrbiSIMS进行蛋白质鉴定,以促进原位成像和深度分析。
DOI:
10.1038/s41467-020-19445-x
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发表时间:
2020-11-17
影响因子:
16.6
通讯作者:
Scurr DJ
中科院分区:
文献类型:
--
作者:
Kotowska AM;Trindade GF;Mendes PM;Williams PM;Aylott JW;Shard AG;Alexander MR;Scurr DJ
Label-free protein characterization at surfaces is commonly achieved using digestion and/or matrix application prior to mass spectrometry. We report the assignment of undigested proteins at surfaces in situ using secondary ion mass spectrometry (SIMS). Ballistic fragmentation of proteins induced by a gas cluster ion beam (GCIB) leads to peptide cleavage producing fragments for subsequent OrbitrapTM analysis. In this work we annotate 16 example proteins (up to 272 kDa) by de novo peptide sequencing and illustrate the advantages of this approach by characterizing a protein monolayer biochip and the depth distribution of proteins in human skin. Label-free protein characterization at surfaces requires digestion or matrix application prior to mass spectrometry. Here, the authors report the assignment of undigested proteins at surfaces by de novo sequencing and apply the methodology to a protein monolayer biochip and for in situ depth profiling of proteins through human skin.
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影响因子:
48
作者:
Passarelli, Melissa K.;Pirkl, Alexander;Gilmore, Ian S.
通讯作者:
Gilmore, Ian S.
影响因子:
2.9
作者:
Hofman, Kathleen;Hall, Bronwyn;Marshall, Susan
通讯作者:
Marshall, Susan
影响因子:
12.3
作者:
Dalgleish, Raymond;Flicek, Paul;Maglott, Donna R.
通讯作者:
Maglott, Donna R.
影响因子:
2.1
作者:
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通讯作者:
Lee, Tae Geol
影响因子:
2.1
作者:
Graham, Daniel J.;Castner, David G.
通讯作者:
Castner, David G.