Symmetry Reduction for Equation 2u + (u2 1 + u2 2 + u2 3)1/2 u0 = 0
نویسندگان
چکیده
منابع مشابه
Efficient association of U2 snRNPs with pre-mRNA requires an essential U2 RNA structural element.
To understand the role of U2 RNA structure in pre-mRNA splicing we have characterized several cold-sensitive mutations in an essential stem-loop of yeast U2. Although mutant U2 is stable in vivo after a shift to restrictive temperature, splicing is rapidly inhibited, suggesting a direct effect on U2 function rather than U2 synthesis or snRNP assembly. Splicing complexes form at 23 degrees C in ...
متن کاملPrp5 bridges U1 and U2 snRNPs and enables stable U2 snRNP association with intron RNA.
Communication between U1 and U2 snRNPs is critical during pre-spliceosome assembly; yet, direct connections have not been observed. To investigate this assembly step, we focused on Prp5, an RNA-dependent ATPase of the DExD/H family. We identified homologs of Saccharomyces cerevisiae Prp5 in humans (hPrp5) and Schizosaccharomyces pombe (SpPrp5), and investigated their interactions and function. ...
متن کاملMutations in an essential U2 small nuclear RNA structure cause cold-sensitive U2 small nuclear ribonucleoprotein function by favoring competing alternative U2 RNA structures.
Mutations in stem-loop IIa of yeast U2 RNA cause cold-sensitive growth and cold-sensitive U2 small nuclear ribonucleoprotein function in vitro. Cold-sensitive U2 small nuclear RNA adopts an alternative conformation that occludes the loop and disrupts the stem but does so at both restrictive and permissive temperatures. To determine whether alternative U2 RNA structure causes the defects, we tes...
متن کاملAmalgams of extremal matroids with no U2, l+2-minor
For an integer l ≥ 2, let U(l) be the class of matroids with no U2,l+2-minor. A matroid in U(l) is extremal if it is simple and has no simple rank-preserving singleelement extension in U(l). An amalgam of two matroids is a simultaneous extension of both on the union of the two ground sets. We study amalgams of extremal matroids in U(l): we determine which amalgams are in U(l) and which are extr...
متن کاملtrans-splicing to spliceosomal U2 snRNA suggests disruption of branch site-U2 pairing during pre-mRNA splicing.
Pairing between U2 snRNA and the branch site of spliceosomal introns is essential for spliceosome assembly and is thought to be required for the first catalytic step of splicing. We have identified an RNA comprising the 5' end of U2 snRNA and the 3' exon of the ACT1-CUP1 reporter gene, resulting from a trans-splicing reaction in which a 5' splice site-like sequence in the universally conserved ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Nonlinear Mathematical Physics
سال: 1995
ISSN: 1776-0852
DOI: 10.2991/jnmp.1995.2.1.5