Structural basis for recognition of 2′,5′-linked oligoadenylates by human ribonuclease L

Tanaka, Nobutada; Nakanishi, Mahito; Kusakabe, Yoshio; Goto, Yoshikuni; Kitade, Yukio; Nakamura, Kazuo

doi:10.1038/sj.emboj.7600420

Cited by 84 publications

(83 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The N-terminal domain could be considered as the regulatory domain, composed of eight complete and one partial ankyrin motifs (R1-R9). The crystallographic data was reported that the N-terminal ankyrin repeat domain of RNase L complex with 2-5A by directly interacting with R2-R4 (15). A certain amount of unactivated RNase L is present in mammal cells.…”

Section: Structure Of Abce1mentioning

confidence: 99%

The biological regulation of ABCE1

2012

View full text Add to dashboard Cite

SummaryATP binding cassette E1 (ABCE1) protein, also named RLI or HP68, is one member of ATP binding cassette superfamily. By forming a heterodimer with RNase L, ABCE1 protein inhibits the IFN-depended 2-5A/RNase L system and regulates a broad range of biological functions including viral infection, tumor cell proliferation, and antiapoptosis. As a highly conserved protein, recent studies have mainly focused that ABCE1 protein is involving in the fields of HIV virus capsids assembly and important roles in translation. Our manuscript will review the studies which revealed the biological regulation of ABCE1.

show abstract

Section: Structure Of Abce1mentioning

confidence: 99%

The biological regulation of ABCE1

2012

View full text Add to dashboard Cite

show abstract

“…Several studies with Nterminal truncations of RNase L in ankyrin motifs or mutation in the two walker A motifs have shown that R1, 7, 8, 9 are essential for 2-5A binding [1,30,31]. The crystal structure of the Nterminal ankyrin repeat domain of RNase L complexed with 2-5A shows that the bound 2-5A directly interacts with R2-R4 [17]. That study indicates that R2-R4 constitute the 2-5A binding pocket and that R7-R9 may be necessary for structural integrity of RNase L rather than directly binding 2-5A.…”

Section: Ii) Rnase L Structurementioning

confidence: 99%

“…The cloning of RNase L in 1993, allowed the subsequent elucidation of its remarkable properties [1] (Figure 2). The recent crystal structure of the 2-5A binding domain of RNase L in a complex with 2-5A provides a detailed view of these interactions at the atomic level [17].…”

Section: I) Introductionmentioning

confidence: 99%

Diverse functions of RNase L and implications in pathology

Bisbal

Silverman

2007

Biochimie

View full text Add to dashboard Cite

The endoribonuclease L (RNase L) is the effector of the 2-5A system, a major enzymatic pathway involved in the molecular mechanism of interferons (IFN). RNase L is a very unusual nuclease with a complex mechanism of regulation. It is a latent enzyme, expressed in nearly every mammalian cell type. Its activation requires its binding to a small oligonucleotide, 2-5A. 2-5A is a series of unique 5′-triphosphorylated oligoadenylates with 2′-5′ phosphodiester bonds. By regulating viral and cellular RNA expression, RNase L plays an important role in the antiviral and antiproliferative activities of IFN and contributes to innate immunity and cell metabolism. The 2-5A/RNase L pathway is implicated in mediating apoptosis in response to viral infections and to several types of external stimuli. Several recent studies have suggested that RNase L could have a role in cancer biology and evidence of a tumor suppressor function of RNase L has emerged from studies on the genetics of hereditary prostate cancer. KeywordsInterferon; RNase L; RNA expression; apoptosis; prostate; virus; cancer I) IntroductionThe endoribonuclease L (RNase L) is the effector of the 2-5A system, a major enzymatic pathway regulated by interferons (IFN) [1] (Figure 1). The 2-5A system is one of the two antiviral pathways induced by IFN and activated by double stranded RNA (dsRNA), the other is mediated by the dsRNA dependent protein kinase (PKR) [2]. RNase L is a very unusual nuclease. It is a latent enzyme, expressed in nearly every mammalian cell type. Its activation requires its binding to a small oligonucleotide, 2-5A ( Figure 1). 2-5A itself is very unusual, consisting of a series of 5′-triphosphorylated oligoadenylates with 2′-5′ phosphodiester bonds in contrast to the 3′-5′ linkages found in RNA and DNA. The initial and essential observation was made by Ian Kerr's group in 1974 reporting an IFN-induced increase in the sensitivity of protein synthesis to inhibition by dsRNA [3]. Peter Lengyel's group observed increased nuclease activity in extracts of interferon treated cells incubated with dsRNA [4,5]. The identification by Ian Kerr's group of the activators of this nuclease, 2-5A [6] and of the enzyme responsible for their synthesis, the 2-5A-synthetase [7][8][9], led to the discovery of the 2-5A pathway. Clemens and Williams directly demonstrated a nuclease, now recognized as RNase Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. (Figure 2). The N-terminal domain could be considered as the regulatory domain of RNase L. It is composed of eight complete and one partial ankyrin motifs (R1-R9). Two wal...

show abstract

“…Therefore, RNase L is not alone, but rather it is the founding member of a family of stressresponse ribonucleases [52,53]. In addition, the deduced amino acid sequence of the 2-5A binding domain led the groups of K. Nakamura and Y. Kitade to solve the crystal structure of this RNase L domain complexed with 2-5A [54]. The structure of the complete RNase L, with or without bound 2-5A, remains to be solved.…”

Section: Molecular Cloning Of Rnase Lmentioning

confidence: 99%

“…From the N-to the C-terminus, there are nine ankyrin repeats, several protein kinase-like motifs and the ribonuclease domain. What distinguishes RNase L from all other ankyrin-repeat proteins is that ankyrin repeats 2 and 4 of RNase L constitute the 2-5A binding site [54]. In the absence of 2-5A, inhibitory domains in the ankyrin and protein kinase motifs suppress the ribonuclease domain while also maintaining RNase L as a monomer, probably due to masking of the interaction sites.…”

mentioning

confidence: 99%

A scientific journey through the 2-5A/RNase L system

Silverman

2007

Cytokine & Growth Factor Reviews

View full text Add to dashboard Cite

The antiviral and antitumor actions of interferons are caused, in part, by a remarkable regulated RNA cleavage pathway known as the 2-5A/RNase L system. 2′-5′ linked oligoadenylates (2-5A) are produced from ATP by interferon-inducible synthetases. 2-5A activates pre-existing RNase L, resulting in the cleavage of RNAs within single-stranded regions. Activation of RNase L by 2-5A leads to an antiviral response, although precisely how this happens is a subject of ongoing investigations. Recently, RNase L was identified as the hereditary prostate cancer 1 gene. That finding has led to the discovery of a novel human retrovirus, XMRV. My scientific journey through the 2-5A system recounts some of the highlights of these efforts. Knowledge gained from studies on the 2-5A system could have an impact on development of therapies for important viral pathogens and cancer.Keywords 2-5A; RNase L; interferon; cancer; virus Background on the 2-5A/RNase L systemOver the past thirty-years, investigations into the mechanisms of interferon (IFN) action have elucidated how antiviral innate immunity operates within and between mammalian cells. The focus of my work over this period has been, and continues to be, probing the biology and biochemistry of the 2-5A/RNase L system, and studying its roles in health and disease. My scientific journey, from basic research to clinical studies, are summarized in this monograph. The 2-5A/RNase L system is one the principal pathways by which IFNs suppress viral infections. Exposure of cells to IFNs induces expression of genes that result in an "antiviral state". Type I IFNs bind to the IFN-α receptor 1 (IFNAR1) and IFNAR2 polypeptide chains on cell surfaces initiating JAK-STAT signaling to the IFN stimulated genes (ISGs) [1]. Included among over a hundred different ISGs are genes encoding 2-5A synthetases (OAS) [2,3]. The OAS genes are a family of ISGs that function in the 2-5A/RNase L system (Fig. 1). In humans there are three functional OAS genes (OAS1-3), resulting in 8 to 10 OAS isoforms due to alternative mRNA splicing [4]. In mice, in addition to OAS2 and OAS3 there are 7 separate OAS1 genes, including OAS1b, the flavivirus resistance gene (Flv r ] [5][6][7][8]. When stimulated by dsRNA, the functional OAS proteins produce a series of short 5′-phosphorylated, 2′,5′-linked oligoadenylates collectively referred to as 2-5A [p x 5′A(2′p5′A) n ; x = 1-3; n≥2] from ATP [9]. The first molecular clone for an OAS was obtained by Michel Revel's lab [10]. Biochemical characterization of OAS proteins by Ara Hovanessian's lab [11][12][13][14] and Ganes Sen's lab [15][16][17][18][19] and a crystal structure by Rune Hartmann and Vivien Yee (in collaboration with Ganes Sen and Just Justesen) [20] have led to functional and structural insight into the OAS family of Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, type...

show abstract

Structural basis for recognition of 2′,5′-linked oligoadenylates by human ribonuclease L

Cited by 84 publications

References 53 publications

The biological regulation of ABCE1

The biological regulation of ABCE1

Diverse functions of RNase L and implications in pathology

A scientific journey through the 2-5A/RNase L system

Contact Info

Product

Resources

About