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Structure of the xenotropic murine leukaemia virus-related virus matrix protein

We present the preparation of the xenotropic murine leukaemia virus-related virus matrix protein (XMRV-MA) and its structure determined by NMR spectroscopy.

The DNA fragment encoding XMRV-MA was obtained from prostate tumour cell cDNA (Rv1 cell line) by PCR and inserted into a pET-22b plasmid. Non-myristoylated, uniformly 13C- and 15N-labeled XMRV-MA, fused with histidine tag, was produced in E. coli BL21 (DE3) cells. The protein was purified by immobilized metal affinity chromatography (NiNTA-agarose) and size-exclusion chromatography (Sephadex 75), and then concentrated to 5 mg/ml.

All NMR data were collected at 298 K on a 600 MHz Bruker Avance III spectrometer equipped with a cryogenic triple-resonance probe and analyzed with CcpNmr Analysis. Back-bone and side-chain resonances were assigned using standard NMR experiments and structural constraints were obtained from 13C- and 15N-edited NOESY experiments. Structures were calculated with ARIA.

Although the protein sequence of the XMRV-MA is very similar to that of the murine leukaemia virus matrix protein (MLV-MA), it varies in several amino acid residues. We compared the structures of the XMRV-MA and MLV-MA and found that those changes are localized in a few domains, mostly on the surface of the protein.

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Correspondence to Michaela Rumlová.

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Open Access This article is published under license to BioMed Central Ltd. This is an Open Access article is distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Doležal, M., Pichová, I., Ruml, T. et al. Structure of the xenotropic murine leukaemia virus-related virus matrix protein. Retrovirology 8 (Suppl 1), A227 (2011).

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  • Leukaemia Virus
  • Prostate Tumour
  • Murine Leukaemia Virus
  • Structural Constraint
  • Immobilize Metal Affinity Chromatography