Evaluation of quantitative performance of sequential immobilized metal affinity chromatographic enrichment for phosphopeptides.

Evaluation of quantitative performance of sequential immobilized metal affinity chromatographic enrichment for phosphopeptides.
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DOI:
10.1016/j.ab.2013.09.025
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发表时间:
2014-01-15
影响因子:
2.9
通讯作者:
Reardon KF
Reardon KF
中科院分区:
生物学4区
文献类型:
--
作者:
Sun Z;Hamilton KL;Reardon KF

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我们评估了一个连续的洗脱方案,从固定化金属亲和层析(SIMAC)采用镓基固定化金属亲和层析(IMAC)结合二氧化钛基金属氧化物亲和层析(MOAC)。使用由酪蛋白、牛血清白蛋白和磷酸肽标准品的胰蛋白酶肽组成的混合物,评价了SIMAC富集方法的定量性能(在重复性、动态范围和线性方面进行评估)。虽然我们的数据证明了SIMAC方法在各种加载条件下的整体一致性能,但结果也表明,该方法对大多数测试的磷酸肽具有有限的重复性和线性,并且发现不同的磷酸肽具有不同的线性范围。这些数据表明,除非使用额外的策略,SIMAC应被视为一个半定量的方法时,用于大规模的磷酸化蛋白质组学研究在复杂的背景。
We evaluated a sequential elution protocol from immobilized metal affinity chromatography (SIMAC) employing gallium-based immobilized metal affinity chromatography (IMAC) in conjunction with titanium-dioxide-based metal oxide affinity chromatography (MOAC). The quantitative performance of this SIMAC enrichment approach, assessed in terms of repeatability, dynamic range, and linearity, was evaluated using a mixture composed of tryptic peptides from caseins, bovine serum albumin, and phosphopeptide standards. While our data demonstrate the overall consistent performance of the SIMAC approach under various loading conditions, the results also revealed that the method had limited repeatability and linearity for most phosphopeptides tested, and different phosphopeptides were found to have different linear ranges. These data suggest that, unless additional strategies are used, SIMAC should be regarded as a semi-quantitative method when used in large-scale phosphoproteomics studies in complex backgrounds.
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