Title

Crystal structure of the nuclear matrix targeting signal of the transcription factor acute myelogenous leukemia-1/polyoma enhancer-binding protein 2alphaB/core binding factor alpha2

UMMS Affiliation

Graduate School of Biomedical Sciences; Program in Molecular Medicine; Department of Cell Biology

Date

11-24-1999

Document Type

Article

Medical Subject Headings

Amino Acid Sequence; Antigens, Nuclear; Core Binding Factor Alpha 2 Subunit; DNA-Binding Proteins; Glutathione Transferase; Glycine; Molecular Sequence Data; *Neoplasm Proteins; Nuclear Proteins; Protein Conformation; *Proto-Oncogene Proteins; Recombinant Fusion Proteins; Sequence Homology, Amino Acid; Transcription Factors

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Transcription factors of the acute myelogenous leukemia (AML)/polyoma enhancer-binding protein (PEBP2alpha)/core-binding factor alpha (CBFA) class are key transactivators of tissue-specific genes of the hematopoietic and bone lineages. AML-1/PEBP2alphaB/CBFA2 proteins participating in transcription are associated with the nuclear matrix. This association is solely dependent on a highly conserved C-terminal protein segment, designated the nuclear matrix targeting signal (NMTS). The NMTS of AML-1 is physically distinct from the nuclear localization signal, operates autonomously, and supports transactivation. Our data indicate that the related AML-3 and AML-2 proteins are also targeted to the nuclear matrix in situ by analogous C-terminal domains. Here we report the first crystal structure of an NMTS in an AML-1 segment fused to glutathione S-transferase. The model of the NMTS consists of two loops connected by a flexible U-shaped peptide chain.

Rights and Permissions

Citation: J Biol Chem. 1999 Nov 19;274(47):33580-6.

Related Resources

Link to Article in PubMed

PubMed ID

10559245