Evidence map›Paper›PMID 17537809›Full record

ArticleNucleic acids research2007

Characterization of the sequence specificity of the R1Bm endonuclease domain by structural and biochemical studies.

Nobuo Maita, Hideyuki Aoyagi, Mizuko Osanai, Masahiro Shirakawa, Haruhiko Fujiwara

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In one paragraph

Article in Nucleic acids research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
2.3field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 18 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 1 country.

Nobuo MaitaGraduate School of Systems Life Sciences, Kyushu University, Fukuoka 812-8582, Japan.
Hideyuki Aoyagi
Mizuko Osanai
Masahiro Shirakawa
Haruhiko Fujiwara
The University of Tokyo · JPKyushu University · JPYokohama City University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

R1Bm is a long interspersed element (LINE) inserted into a specific sequence within 28S rDNA of the silkworm genome. Of two open reading frames (ORFs) of R1Bm, ORF2 encodes a reverse transcriptase (RT) and an endonuclease (EN) domain which digests specifically both top and bottom strand of the target sequence in 28S rDNA. To elucidate the sequence specificity of EN domain of R1Bm (R1Bm EN), we examined the cleavage tendency for the target sequences, and found that 5'-A(G/C)(A/T)!(A/G)T-3' is the consensus sequence (! = cleavage site). We also determined the crystal structure of R1Bm EN at 2.0 A resolution. Its structure was basically similar to AP endonuclease family, but had a special beta-hairpin at the edge of the DNA binding surface, which is a common feature among EN of LINEs. Point-mutations on the DNA binding surface of R1Bm EN significantly decreased the cleavage activities, but did not affect the sequence recognition in most residues. However, two mutants Y98A and N180A had altered cleavage patterns, suggesting an important role of these residues (Y98 and N180) for the sequence recognition of R1Bm EN. In addition, Y98A mutant showed another cleavage pattern, that implies de novo design of novel sequence-specific EN.

Indexed as

Long Interspersed Nucleotide ElementsAmino Acid SequenceBase SequenceConsensus SequenceDNA, RibosomalEndodeoxyribonucleasesModels, MolecularMolecular Sequence DataMutagenesis, Site-DirectedProtein Structure, TertiaryRNA, Ribosomal, 28SSubstrate SpecificityDNA, RibosomalEndodeoxyribonucleasesRNA, Ribosomal, 28S

Identifiers

PMID17537809
PMCPMC1919474
OpenAlexW2019581405

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.