Evidence map›Paper›PMID 30016590›Full record

ArticleAnalytical chemistry2018

Multistage Ultraviolet Photodissociation Mass Spectrometry To Characterize Single Amino Acid Variants of Human Mitochondrial BCAT2.

M Rachel Mehaffey, James D Sanders, Dustin D Holden, Carol L Nilsson, Jennifer S Brodbelt

Abstract read
In one paragraph

Article in Analytical chemistry, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 41 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

M Rachel MehaffeyDepartment of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.
James D SandersDepartment of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.
Dustin D HoldenDepartment of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.
Carol L NilssonInstitute of Experimental Medical Sciences , Lund University , SE-221 Lund , Sweden.ORCID 0000-0002-2838-8751
Jennifer S BrodbeltDepartment of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.ORCID 0000-0003-3207-0217
The University of Texas at Austin · USLund University · SE

Funding

UVPD Mass Spectrometry of Protein ComplexesR01GM121714 · NIGMS · UNIVERSITY OF TEXAS AT AUSTIN · PI BRODBELT, JENNIFER S. · 2017 to 2020
$1.4M
NIGMS NIH HHS R01 GM121714
6 · The paper itself

Abstract

Unraveling disease mechanisms requires a comprehensive understanding of how the interplay between higher-order structure and protein-ligand interactions impacts the function of a given protein. Recent advances in native mass spectrometry (MS) involving multimodal or higher-energy activation methods have allowed direct interrogation of intact protein complexes in the gas phase, allowing analysis of both composition and subunit connectivity. We report a multistage approach combining collisional activation and 193 nm ultraviolet photodissociation (UVPD) to characterize single amino acid variants of the human mitochondrial enzyme branched-chain amino acid transferase 2 (BCAT2), a protein implicated in chemotherapeutic resistance in glioblastoma tumors. Native electrospray ionization confirms that both proteins exist as homodimers. Front-end collisional activation disassembles the dimers into monomeric subunits that are further interrogated using UVPD to yield high sequence coverage of the mutated region. Additionally, holo (ligand-bound) fragment ions resulting from photodissociation reveal that the mutation causes destabilization of the interactions with a bound cofactor. This study demonstrates the unique advantages of implementing UVPD in a multistage MS approach for analyzing intact protein assemblies.

Indexed as

Amino Acid SubstitutionBinding SitesHumansMass SpectrometryMinor Histocompatibility AntigensMitochondrial ProteinsMutationPregnancy ProteinsPyridoxal PhosphateTransaminasesUltraviolet RaysBCAT2 protein, humanMinor Histocompatibility AntigensMitochondrial ProteinsPregnancy ProteinsPyridoxal PhosphateTransaminases

Identifiers

PMID30016590
PMCPMC6323636
OpenAlexW2883882450

What OpenQuestion holds

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LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.