5zwn

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==Cryo-EM structure of the yeast pre-B complex at an average resolution of 3.3 angstrom (Part II: U1 snRNP region)==
==Cryo-EM structure of the yeast pre-B complex at an average resolution of 3.3 angstrom (Part II: U1 snRNP region)==
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<StructureSection load='5zwn' size='340' side='right'caption='[[5zwn]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
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<SX load='5zwn' size='340' side='right' viewer='molstar' caption='[[5zwn]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[5zwn]] is a 20 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_s288c Saccharomyces cerevisiae s288c]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ZWN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5ZWN FirstGlance]. <br>
<table><tr><td colspan='2'>[[5zwn]] is a 20 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_s288c Saccharomyces cerevisiae s288c]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ZWN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5ZWN FirstGlance]. <br>
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</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/SMD1_YEAST SMD1_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Also binds telomerase RNA and is required for its accumulation.<ref>PMID:10490028</ref> <ref>PMID:8430095</ref> [[http://www.uniprot.org/uniprot/PRP39_YEAST PRP39_YEAST]] Function prior to stable branch point recognition by the U1 snRNP particle to facilitate or stabilize the U1 snRNP/5'-splice site interaction. Has a direct role in the assembly or function of a catalytically active spliceosome. [[http://www.uniprot.org/uniprot/SNU71_YEAST SNU71_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway.<ref>PMID:11877437</ref> [[http://www.uniprot.org/uniprot/LUC7_YEAST LUC7_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway.<ref>PMID:10500099</ref> <ref>PMID:10533282</ref> [[http://www.uniprot.org/uniprot/RUXG_YEAST RUXG_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/SMD3_YEAST SMD3_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Also binds telomerase RNA and is required for its accumulation.<ref>PMID:10490028</ref> <ref>PMID:7799953</ref> [[http://www.uniprot.org/uniprot/PRP42_YEAST PRP42_YEAST]] Essential component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway. U1 snRNP is cotranscriptionally recruited to intron-containing genes. Required for U1 snRNP biogenesis.<ref>PMID:12897147</ref> <ref>PMID:9418882</ref> [[http://www.uniprot.org/uniprot/RU17_YEAST RU17_YEAST]] Involved in nuclear mRNA splicing. [[http://www.uniprot.org/uniprot/SNU56_YEAST SNU56_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway. [[http://www.uniprot.org/uniprot/SMD2_YEAST SMD2_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/PRP28_YEAST PRP28_YEAST]] ATP-dependent RNA helicase involved in mRNA splicing. May destabilize the U1/5'-splice site duplex to permit an effective competition for the 5'-splice site by the U6 snRNA, resulting in the switch between U1 and U6 at the 5'-splice site. May also act to unwind the U4/U6 base-pairing interaction in the U4/U6/U5 snRNP, facilitating the first covalent step of splicing.<ref>PMID:10024879</ref> <ref>PMID:11172727</ref> <ref>PMID:2010088</ref> [[http://www.uniprot.org/uniprot/RUXE_YEAST RUXE_YEAST]] Involved in pre-mRNA splicing. Binds and is required for the stability of snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Involved in cap modification.<ref>PMID:8918241</ref> [[http://www.uniprot.org/uniprot/RUXF_YEAST RUXF_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/NAM8_YEAST NAM8_YEAST]] Acts as a suppressor of mitochondrial splicing deficiencies when overexpressed. Could be a non-essential component of the mitochondrial splicing machinery. [[http://www.uniprot.org/uniprot/RU1C_YEAST RU1C_YEAST]] Component of the spliceosomal U1 snRNP, which is essential for recognition of the pre-mRNA 5' splice-site and the subsequent assembly of the spliceosome. YHC1/U1-C is directly involved in initial 5' splice-site recognition for both constitutive and regulated alternative splicing. The interaction with the 5' splice-site seems to precede base-pairing between the pre-mRNA and the U1 snRNA. Stimulates commitment or early (E) complex formation by stabilizing the base pairing of the 5' end of the U1 snRNA and the 5' splice-site region.<ref>PMID:10072386</ref> <ref>PMID:12214237</ref> <ref>PMID:9233817</ref> [[http://www.uniprot.org/uniprot/RSMB_YEAST RSMB_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/RU1A_YEAST RU1A_YEAST]] Involved in nuclear mRNA splicing. The principal role of the U1A is to help fold or maintain U1 RNA in an active configuration. It is the first snRNP to interact with pre-mRNA. This interaction is required for the subsequent binding of U2 snRNP and the U4/U6/U5 tri-snRNP.<ref>PMID:8449403</ref> <ref>PMID:8849781</ref>
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[[http://www.uniprot.org/uniprot/PRP42_YEAST PRP42_YEAST]] Essential component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway. U1 snRNP is cotranscriptionally recruited to intron-containing genes. Required for U1 snRNP biogenesis.<ref>PMID:12897147</ref> <ref>PMID:9418882</ref> [[http://www.uniprot.org/uniprot/SMD1_YEAST SMD1_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Also binds telomerase RNA and is required for its accumulation.<ref>PMID:10490028</ref> <ref>PMID:8430095</ref> [[http://www.uniprot.org/uniprot/RU17_YEAST RU17_YEAST]] Involved in nuclear mRNA splicing. [[http://www.uniprot.org/uniprot/PRP39_YEAST PRP39_YEAST]] Function prior to stable branch point recognition by the U1 snRNP particle to facilitate or stabilize the U1 snRNP/5'-splice site interaction. Has a direct role in the assembly or function of a catalytically active spliceosome. [[http://www.uniprot.org/uniprot/SNU56_YEAST SNU56_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway. [[http://www.uniprot.org/uniprot/SNU71_YEAST SNU71_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway.<ref>PMID:11877437</ref> [[http://www.uniprot.org/uniprot/SMD2_YEAST SMD2_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/PRP28_YEAST PRP28_YEAST]] ATP-dependent RNA helicase involved in mRNA splicing. May destabilize the U1/5'-splice site duplex to permit an effective competition for the 5'-splice site by the U6 snRNA, resulting in the switch between U1 and U6 at the 5'-splice site. May also act to unwind the U4/U6 base-pairing interaction in the U4/U6/U5 snRNP, facilitating the first covalent step of splicing.<ref>PMID:10024879</ref> <ref>PMID:11172727</ref> <ref>PMID:2010088</ref> [[http://www.uniprot.org/uniprot/RUXF_YEAST RUXF_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/RUXE_YEAST RUXE_YEAST]] Involved in pre-mRNA splicing. Binds and is required for the stability of snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Involved in cap modification.<ref>PMID:8918241</ref> [[http://www.uniprot.org/uniprot/NAM8_YEAST NAM8_YEAST]] Acts as a suppressor of mitochondrial splicing deficiencies when overexpressed. Could be a non-essential component of the mitochondrial splicing machinery. [[http://www.uniprot.org/uniprot/RU1C_YEAST RU1C_YEAST]] Component of the spliceosomal U1 snRNP, which is essential for recognition of the pre-mRNA 5' splice-site and the subsequent assembly of the spliceosome. YHC1/U1-C is directly involved in initial 5' splice-site recognition for both constitutive and regulated alternative splicing. The interaction with the 5' splice-site seems to precede base-pairing between the pre-mRNA and the U1 snRNA. Stimulates commitment or early (E) complex formation by stabilizing the base pairing of the 5' end of the U1 snRNA and the 5' splice-site region.<ref>PMID:10072386</ref> <ref>PMID:12214237</ref> <ref>PMID:9233817</ref> [[http://www.uniprot.org/uniprot/LUC7_YEAST LUC7_YEAST]] Component of the U1 snRNP particle, which recognizes and binds the 5'-splice site of pre-mRNA. Together with other non-snRNP factors, U1 snRNP forms the spliceosomal commitment complex, that targets pre-mRNA to the splicing pathway.<ref>PMID:10500099</ref> <ref>PMID:10533282</ref> [[http://www.uniprot.org/uniprot/RSMB_YEAST RSMB_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/SMD3_YEAST SMD3_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. Also binds telomerase RNA and is required for its accumulation.<ref>PMID:10490028</ref> <ref>PMID:7799953</ref> [[http://www.uniprot.org/uniprot/RUXG_YEAST RUXG_YEAST]] Involved in pre-mRNA splicing. Binds snRNA U1, U2, U4 and U5 which contain a highly conserved structural motif called the Sm binding site. [[http://www.uniprot.org/uniprot/RU1A_YEAST RU1A_YEAST]] Involved in nuclear mRNA splicing. The principal role of the U1A is to help fold or maintain U1 RNA in an active configuration. It is the first snRNP to interact with pre-mRNA. This interaction is required for the subsequent binding of U2 snRNP and the U4/U6/U5 tri-snRNP.<ref>PMID:8449403</ref> <ref>PMID:8849781</ref>
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== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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<references/>
<references/>
__TOC__
__TOC__
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</StructureSection>
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</SX>
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: RNA helicase]]
[[Category: RNA helicase]]

Revision as of 20:19, 6 March 2020

Cryo-EM structure of the yeast pre-B complex at an average resolution of 3.3 angstrom (Part II: U1 snRNP region)

5zwn, resolution 3.30Å

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