Evidence map›Paper›PMID 25391768›Full record

ArticleMolecular biology reports2015

Soluble overexpression and purification of bioactive human CCL2 in E. coli by maltose-binding protein.

Thu Trang Thi Vu, Bon-Kyung Koo, Jung-A Song, Seon-Ha Chong, Cho Rong Park, Minh Tan Nguyen, Boram Jeong, Han-Bong Ryu, Jae Young Seong, Yeon Jin Jang and 2 more

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Article in Molecular biology reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.0field-weighted citation impact, top 26% 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

10 citing papers in PubMed, 15 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

12 authors at 4 institutions in 3 countries.

Thu Trang Thi VuDepartment of Physiology and Bio-Medical Institute of Technology, University of Ulsan College of Medicine, Seoul, 138-736, South Korea.
Bon-Kyung Koo
Jung-A Song
Seon-Ha Chong
Cho Rong Park
Minh Tan Nguyen
Boram Jeong
Han-Bong Ryu
Jae Young Seong
Yeon Jin Jang
Robert Charles Robinson
Han Choe
Ulsan College · KRUniversity of Ulsan · KRKorea University · JPAgency for Science, Technology and Research · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Human chemokine (C-C motif) ligand 2 (hCCL2) is a small cytokine in the CC chemokine family that attracts monocytes, memory T lymphocytes, and natural killer cells to the site of tissue injury- or infection-induced inflammation. hCCL2 has been implicated in the pathogeneses of diseases characterized by monocytic infiltrates, including psoriasis, rheumatoid arthritis, atherosclerosis, multiple sclerosis, and insulin-resistant diabetes. The prokaryotic overexpression of hCCL2 has been investigated previously in an attempt to develop biomedical applications for this factor, but this has been hampered by protein misfolding and aggregation into inclusion bodies. In our present study, we screened 7 protein tags-Trx, GST, MBP, NusA, His8, PDI, and PDIb'a'-for their ability to allow the soluble overexpression of hCCL2. Three tags-MBP, His8, and PDI-solubilized more than half of the expressed hCCL2 fusion proteins. Lowering the expression temperature to 18 °C significantly further improved the solubility of all fusion proteins. MBP was chosen for further study based on its solubility, expression level, ease of purification, and tag size. MBP-CCL2 was purified using conventional chromatography and cleaved using TEV or Factor Xa proteases. Biological activity was assessed using luciferase and cell migration assays. Factor Xa-cleaved hCCL2 was found to be active and TEV-cleaved hCCL2 showed relatively less activity. This is probably because the additional glycine residues present at the N-terminus of hCCL2 following TEV digestion interfere with the binding of hCCL2 to its receptor.

Indexed as

Gene ExpressionCell LineChemokine CCL2Escherichia coliGene OrderHumansMaltose-Binding ProteinsPlasmidsRecombinant Fusion ProteinsSolubilitySpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationChemokine CCL2Maltose-Binding ProteinsRecombinant Fusion Proteins

Identifiers

PMID25391768
OpenAlexW1972165807

What OpenQuestion holds

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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.