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    Virology. 1998 Jul 20;247(1):74-85.

    A novel human DnaJ protein, hTid-1, a homolog of the Drosophila tumor suppressor protein Tid56, can interact with the human papillomavirus type 16 E7 oncoprotein.

    Schilling B, De-Medina T, Syken J, Vidal M, Münger K.

    Department of Pathology and Harvard Center for Cancer Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.

    We have cloned hTid-1, a human homolog of the Drosophila tumor suppressor protein Tid56, by virtue of its ability to form complexes with the human papillomavirus E7 oncoprotein. The carboxyl terminal cysteine-rich metal binding domain of E7 is the major determinant for interaction with hTid-1. The carboxyl terminus of E7 is essential for the functional and structural integrity of E7 and has previously been shown to function as a multimerization domain. The hTid-1 protein is a member of the DnaJ-family of chaperones. Its mRNA is widely expressed in human tissues, including the HPV-18-positive cervical carcinoma cell line HeLa and human genital keratinocytes, the normal host cells of the HPVs. The hTid-1 gene has been mapped to the short arm of chromosome 16. The large tumor antigens of polyomaviruses encode functional J-domains that are important for viral replication as well as cellular transformation. The ability of HPV E7 to interact with a cellular DnaJ protein suggests that these two viral oncoproteins may target common regulatory pathways through J-domains.

    PMID: 9683573 [PubMed - indexed for MEDLINE]

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