Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.1.30.1 (S1 nuclease)
 3,660 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The single-copy RP2 gene in mice produces three major mRNAs, the abundances of which are significantly increased in the kidneys by the administration of testosterone. S1 nuclease analysis of the kidney mRNAs indicated that they differ in the lengths of their 3' untranslated regions as a result of the use of different polyadenylation sites. When the mRNAs from different inbred mouse strains were examined by Northern blot analysis, it was observed that the largest mRNA varies in size, whereas the sizes of the other mRNAs remain the same. In DBA/LiHa and DBA/2J mice, the largest mRNA is approximately 2,150 nucleotides long, whereas the corresponding mRNA in C57BL/6J and BALB/cJ mice is only 1,950 nucleotides in length. All of these strains also have RP2 mRNAs that are 1,450 and 1,350 nucleotides long. By S1 nuclease mapping and comparison of the sequence of cDNA clones representing these mRNAs in DBA/LiHa and C57BL/6J mice, we determined that this size difference or polymorphism observed in the largest mRNA is the result of the insertion of a member of the B1 family of repeats into the 3' untranslated region of the RP2 gene in DBA mice. This particular B1 repeat is transcribed by RNA polymerase III in vitro, and its transcriptional orientation is opposite to that of the RP2 transcript. The polymorphism described here is evidence for the mobility of B1 repetitive elements within the genome.
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PMID:Polymorphism in an androgen-regulated mouse gene is the result of the insertion of a B1 repetitive element into the transcription unit. 302 23

The H-2Kd gene, which encodes a mouse major transplantation antigen, was transfected into L TK- mouse fibroblasts. Two transcripts of the gene were detected by S1 nuclease mapping analysis. They correspond to two previously characterized cDNA clones isolated from DBA/2 mouse liver RNA, leading to the conclusion that the H-2Kd gene gives rise to two distinct transcripts through an alternate use of splicing sites. The non-canonical RNA potentially encodes a so far undescribed H-2Kd-like molecule. It is present in all tissues tested (liver, spleen, thymus, kidney) albeit in lower amounts (approximately 10-fold less) than the canonical RNA coding for H-2Kd.
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PMID:Alternative splicing in the 5' moiety of the H-2Kd gene transcript. 609 82