Добавил:
kiopkiopkiop18@yandex.ru t.me/Prokururor I Вовсе не секретарь, но почту проверяю Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Ординатура / Офтальмология / Английские материалы / Retinal Degenerative Diseases Laboratory and Therapeutic Investigations_Anderson_2008.pdf
Скачиваний:
0
Добавлен:
28.03.2026
Размер:
10.55 Mб
Скачать

Chapter 10

ZBED4, A Novel Retinal Protein Expressed

in Cones and Müller Cells

Debora B. Farber, V.P. Theendakara, N.B. Akhmedov, and M. Saghizadeh

Abstract To identify genes expressed in cone photoreceptors, we previously carried out subtractive hybridization and microarrays of retinal mRNAs from normal and cd (cone degeneration) dogs. One of the isolated genes encoded ZBED4, a novel protein that in human retina is localized to cone photoreceptors and glial Müller cells. ZBED4 is distributed between nuclear and cytoplasmic fractions of the retina and it readily forms homodimers, probably as a consequence of its hATC dimerization domain. In addition, the ZBED4 sequence has several domains that suggest it may function as part of a co-activator complex facilitating the activation of nuclear receptors and other factors (BED finger domains) or as a co-activator/co-repressor of nuclear hormone receptors (LXXLL motifs). We have identified several putative ZBED4-interacting proteins and one of them is precisely a co-repressor of the estrogen receptor α.

10.1 Introduction

The most common types of inherited retinal degenerations in man and animals are those involving the specific demise of photoreceptor cells. The loss of rods occurs first in many of these disorders – usually as the result of mutated genes expressed selectively in rod photoreceptors – but it is followed by the demise of cones even when the defective gene is not expressed in these cells. In contrast, those retinal degenerations presenting first loss of cone photoreceptors caused by mutated genes expressed specifically in cones may or may not manifest subsequent loss of rods. Different hypotheses have been formulated as to why defective rod or cone-specific genes can lead to degeneration of the other type of photoreceptor. However, this is

D.B. Farber (B)

Jules Stein Eye Institute, UCLA School of Medicine, 100 Stein Plaza, Los Angeles, CA 90095-7000, USA

e-mail: farber@jsei.ucla.edu

R.E. Anderson et al. (eds.), Retinal Degenerative Diseases, Advances in Experimental

79

Medicine and Biology 664, DOI 10.1007/978-1-4419-1399-9_10,C Springer Science+Business Media, LLC 2010