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. 1992 Nov;11(11):4119–4129. doi: 10.1002/j.1460-2075.1992.tb05505.x

A POU-A related region dictates DNA binding specificity of LFB1/HNF1 by orienting the two XL-homeodomains in the dimer.

L Tomei 1, R Cortese 1, R De Francesco 1
PMCID: PMC556922  PMID: 1356766

Abstract

LFB1/HNF1 regulates the hepatocyte-specific transcription of several genes, binding as a dimer to cis-acting elements that match the inverted palindrome GTTAATNATTAAC. The DNA binding domain of LFB1/HNF1 is characterized by a unique tripartite structure that includes an unusually long homeodomain (domain C), a region related to the POU-specific A-box (domain B) and a short N-terminal dimerization domain (domain A). We report that a recombinant peptide corresponding to the isolated homeodomain of LFB1/HNF1 binds as a monomer to a half-palindrome binding site, but shows diminished sequence specificity. Domain B, in addition to the homeodomain, is required and sufficient for proper recognition of LFB1/HNF1-responsive sites. A protein consisting of only these latter two domains is a monomer in solution, but forms dimers upon DNA binding. The protein-protein contacts established within the bound dimer restrain the orientation of the two homeodomains with respect to one another, thus contributing in a critical fashion to the recognition of the dyad symmetry-related LFB1/HNF1 sites. The DNA-independent dimerization domain (domain A) is required to increase the affinity of DNA binding, but does not influence the dimer geometry.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Affolter M., Percival-Smith A., Müller M., Leupin W., Gehring W. J. DNA binding properties of the purified Antennapedia homeodomain. Proc Natl Acad Sci U S A. 1990 Jun;87(11):4093–4097. doi: 10.1073/pnas.87.11.4093. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Banner D. W., Kokkinidis M., Tsernoglou D. Structure of the ColE1 rop protein at 1.7 A resolution. J Mol Biol. 1987 Aug 5;196(3):657–675. doi: 10.1016/0022-2836(87)90039-8. [DOI] [PubMed] [Google Scholar]
  3. Billeter M., Qian Y., Otting G., Müller M., Gehring W. J., Wüthrich K. Determination of the three-dimensional structure of the Antennapedia homeodomain from Drosophila in solution by 1H nuclear magnetic resonance spectroscopy. J Mol Biol. 1990 Jul 5;214(1):183–197. doi: 10.1016/0022-2836(90)90155-f. [DOI] [PubMed] [Google Scholar]
  4. Chouard T., Blumenfeld M., Bach I., Vandekerckhove J., Cereghini S., Yaniv M. A distal dimerization domain is essential for DNA-binding by the atypical HNF1 homeodomain. Nucleic Acids Res. 1990 Oct 11;18(19):5853–5863. doi: 10.1093/nar/18.19.5853. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Civitareale D., Lonigro R., Sinclair A. J., Di Lauro R. A thyroid-specific nuclear protein essential for tissue-specific expression of the thyroglobulin promoter. EMBO J. 1989 Sep;8(9):2537–2542. doi: 10.1002/j.1460-2075.1989.tb08391.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. De Francesco R., Pastore A., Vecchio G., Cortese R. Circular dichroism study on the conformational stability of the dimerization domain of transcription factor LFB1. Biochemistry. 1991 Jan 8;30(1):143–147. doi: 10.1021/bi00215a021. [DOI] [PubMed] [Google Scholar]
  7. De Simone V., De Magistris L., Lazzaro D., Gerstner J., Monaci P., Nicosia A., Cortese R. LFB3, a heterodimer-forming homeoprotein of the LFB1 family, is expressed in specialized epithelia. EMBO J. 1991 Jun;10(6):1435–1443. doi: 10.1002/j.1460-2075.1991.tb07664.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Finney M. The homeodomain of the transcription factor LF-B1 has a 21 amino acid loop between helix 2 and helix 3. Cell. 1990 Jan 12;60(1):5–6. doi: 10.1016/0092-8674(90)90708-m. [DOI] [PubMed] [Google Scholar]
  9. Frain M., Swart G., Monaci P., Nicosia A., Stämpfli S., Frank R., Cortese R. The liver-specific transcription factor LF-B1 contains a highly diverged homeobox DNA binding domain. Cell. 1989 Oct 6;59(1):145–157. doi: 10.1016/0092-8674(89)90877-5. [DOI] [PubMed] [Google Scholar]
  10. Harrison S. C., Aggarwal A. K. DNA recognition by proteins with the helix-turn-helix motif. Annu Rev Biochem. 1990;59:933–969. doi: 10.1146/annurev.bi.59.070190.004441. [DOI] [PubMed] [Google Scholar]
  11. Helmer-Citterich M., Anceschi M. M., Banner D. W., Cesareni G. Control of ColE1 replication: low affinity specific binding of Rop (Rom) to RNAI and RNAII. EMBO J. 1988 Feb;7(2):557–566. doi: 10.1002/j.1460-2075.1988.tb02845.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Herr W., Sturm R. A., Clerc R. G., Corcoran L. M., Baltimore D., Sharp P. A., Ingraham H. A., Rosenfeld M. G., Finney M., Ruvkun G. The POU domain: a large conserved region in the mammalian pit-1, oct-1, oct-2, and Caenorhabditis elegans unc-86 gene products. Genes Dev. 1988 Dec;2(12A):1513–1516. doi: 10.1101/gad.2.12a.1513. [DOI] [PubMed] [Google Scholar]
  13. Hu J. C., O'Shea E. K., Kim P. S., Sauer R. T. Sequence requirements for coiled-coils: analysis with lambda repressor-GCN4 leucine zipper fusions. Science. 1990 Dec 7;250(4986):1400–1403. doi: 10.1126/science.2147779. [DOI] [PubMed] [Google Scholar]
  14. Ingraham H. A., Flynn S. E., Voss J. W., Albert V. R., Kapiloff M. S., Wilson L., Rosenfeld M. G. The POU-specific domain of Pit-1 is essential for sequence-specific, high affinity DNA binding and DNA-dependent Pit-1-Pit-1 interactions. Cell. 1990 Jun 15;61(6):1021–1033. doi: 10.1016/0092-8674(90)90067-o. [DOI] [PubMed] [Google Scholar]
  15. Lamb P., McKnight S. L. Diversity and specificity in transcriptional regulation: the benefits of heterotypic dimerization. Trends Biochem Sci. 1991 Nov;16(11):417–422. doi: 10.1016/0968-0004(91)90167-t. [DOI] [PubMed] [Google Scholar]
  16. Laughon A. DNA binding specificity of homeodomains. Biochemistry. 1991 Dec 3;30(48):11357–11367. doi: 10.1021/bi00112a001. [DOI] [PubMed] [Google Scholar]
  17. LeBowitz J. H., Clerc R. G., Brenowitz M., Sharp P. A. The Oct-2 protein binds cooperatively to adjacent octamer sites. Genes Dev. 1989 Oct;3(10):1625–1638. doi: 10.1101/gad.3.10.1625. [DOI] [PubMed] [Google Scholar]
  18. Lichtsteiner S., Wuarin J., Schibler U. The interplay of DNA-binding proteins on the promoter of the mouse albumin gene. Cell. 1987 Dec 24;51(6):963–973. doi: 10.1016/0092-8674(87)90583-6. [DOI] [PubMed] [Google Scholar]
  19. Mendel D. B., Crabtree G. R. HNF-1, a member of a novel class of dimerizing homeodomain proteins. J Biol Chem. 1991 Jan 15;266(2):677–680. [PubMed] [Google Scholar]
  20. Mendel D. B., Khavari P. A., Conley P. B., Graves M. K., Hansen L. P., Admon A., Crabtree G. R. Characterization of a cofactor that regulates dimerization of a mammalian homeodomain protein. Science. 1991 Dec 20;254(5039):1762–1767. doi: 10.1126/science.1763325. [DOI] [PubMed] [Google Scholar]
  21. Monaci P., Nicosia A., Cortese R. Two different liver-specific factors stimulate in vitro transcription from the human alpha 1-antitrypsin promoter. EMBO J. 1988 Jul;7(7):2075–2087. doi: 10.1002/j.1460-2075.1988.tb03047.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Nicosia A., Monaci P., Tomei L., De Francesco R., Nuzzo M., Stunnenberg H., Cortese R. A myosin-like dimerization helix and an extra-large homeodomain are essential elements of the tripartite DNA binding structure of LFB1. Cell. 1990 Jun 29;61(7):1225–1236. doi: 10.1016/0092-8674(90)90687-a. [DOI] [PubMed] [Google Scholar]
  23. O'Shea E. K., Rutkowski R., Stafford W. F., 3rd, Kim P. S. Preferential heterodimer formation by isolated leucine zippers from fos and jun. Science. 1989 Aug 11;245(4918):646–648. doi: 10.1126/science.2503872. [DOI] [PubMed] [Google Scholar]
  24. Oas T. G., McIntosh L. P., O'Shea E. K., Dahlquist F. W., Kim P. S. Secondary structure of a leucine zipper determined by nuclear magnetic resonance spectroscopy. Biochemistry. 1990 Mar 27;29(12):2891–2894. doi: 10.1021/bi00464a001. [DOI] [PubMed] [Google Scholar]
  25. Otting G., Qian Y. Q., Billeter M., Müller M., Affolter M., Gehring W. J., Wüthrich K. Protein--DNA contacts in the structure of a homeodomain--DNA complex determined by nuclear magnetic resonance spectroscopy in solution. EMBO J. 1990 Oct;9(10):3085–3092. doi: 10.1002/j.1460-2075.1990.tb07505.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Pastore A., De Francesco R., Barbato G., Castiglione Morelli M. A., Motta A., Cortese R. 1H resonance assignment and secondary structure determination of the dimerization domain of transcription factor LFB1. Biochemistry. 1991 Jan 8;30(1):148–153. doi: 10.1021/bi00215a022. [DOI] [PubMed] [Google Scholar]
  27. Percival-Smith A., Müller M., Affolter M., Gehring W. J. The interaction with DNA of wild-type and mutant fushi tarazu homeodomains. EMBO J. 1990 Dec;9(12):3967–3974. doi: 10.1002/j.1460-2075.1990.tb07617.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Rosenfeld M. G. POU-domain transcription factors: pou-er-ful developmental regulators. Genes Dev. 1991 Jun;5(6):897–907. doi: 10.1101/gad.5.6.897. [DOI] [PubMed] [Google Scholar]
  29. Saudek V., Pastore A., Morelli M. A., Frank R., Gausepohl H., Gibson T. The solution structure of a leucine-zipper motif peptide. Protein Eng. 1991 Jun;4(5):519–529. doi: 10.1093/protein/4.5.519. [DOI] [PubMed] [Google Scholar]
  30. Sauer R. T., Jordan S. R., Pabo C. O. Lambda repressor: a model system for understanding protein-DNA interactions and protein stability. Adv Protein Chem. 1990;40:1–61. doi: 10.1016/s0065-3233(08)60286-7. [DOI] [PubMed] [Google Scholar]
  31. Senear D. F., Brenowitz M. Determination of binding constants for cooperative site-specific protein-DNA interactions using the gel mobility-shift assay. J Biol Chem. 1991 Jul 25;266(21):13661–13671. [PubMed] [Google Scholar]
  32. Smith D. L., Johnson A. D. A molecular mechanism for combinatorial control in yeast: MCM1 protein sets the spacing and orientation of the homeodomains of an alpha 2 dimer. Cell. 1992 Jan 10;68(1):133–142. doi: 10.1016/0092-8674(92)90212-u. [DOI] [PubMed] [Google Scholar]
  33. Studier F. W., Moffatt B. A. Use of bacteriophage T7 RNA polymerase to direct selective high-level expression of cloned genes. J Mol Biol. 1986 May 5;189(1):113–130. doi: 10.1016/0022-2836(86)90385-2. [DOI] [PubMed] [Google Scholar]
  34. Treacy M. N., He X., Rosenfeld M. G. I-POU: a POU-domain protein that inhibits neuron-specific gene activation. Nature. 1991 Apr 18;350(6319):577–584. doi: 10.1038/350577a0. [DOI] [PubMed] [Google Scholar]
  35. Tsai S. Y., Tsai M. J., O'Malley B. W. Cooperative binding of steroid hormone receptors contributes to transcriptional synergism at target enhancer elements. Cell. 1989 May 5;57(3):443–448. doi: 10.1016/0092-8674(89)90919-7. [DOI] [PubMed] [Google Scholar]
  36. Voss J. W., Wilson L., Rosenfeld M. G. POU-domain proteins Pit-1 and Oct-1 interact to form a heteromeric complex and can cooperate to induce expression of the prolactin promoter. Genes Dev. 1991 Jul;5(7):1309–1320. doi: 10.1101/gad.5.7.1309. [DOI] [PubMed] [Google Scholar]

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