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FAQ

Cleavage and polyadenylation specificity factor subunit 6


Known also as: Pre-mRNA cleavage factor Im 68 kDa subunit, Protein HPBRII-4/7
Known abbreviations: CPSF6, CFIM, CFIm68, HPBRII-4, HPBRII-7

Yeast homolog: not known

Protein




Structures

Models
Domains

Secondary structure

Disorder

This protein is highly disordered (82 % of residues are predicted to be disordered)

Top 3 models:
Template: 3q2s, chain C
Method: hhsearch
Fragment: 14-273
Template: 3pgw, chain S
Method: hhsearch
Fragment: 1-551,many gaps
Template: 3dxj, chain N
Method: compass
Fragment: 4-304


This protein has alternative isoforms:
Isoform 1:
Sequence length:551 aa
Molecular weight:59.21 kDa
Isoelectric point:6.9
Sequence:
1........10........20........30........40........50........60........70........80........90........100.......110.......120.......130
MADGVDHIDIYADVGEEFNQEAEYGGHDQIDLYDDVISPSANNGDAPEDRDYMDTLPPTVGDDVGKGAAPNVVYTYTGKRIALYIGNLTWWTTDEDLTEAVHSLGVNDILEIKFFENRANGQSKGFALVG
VGSEASSKKLMDLLPKRELHGQNPVVTPCNKQFLSQFEMQSRKTTQSGQMSGEGKAGPPGGSSRAAFPQGGRGRGRFPGAVPGGDRFPGPAGPGGPPPPFPAGQTPPRPPLGPPGPPGPPGPPPPGQVLP
PPLAGPPNRGDRPPPPVLFPGQPFGQPPLGPLPPGPPPPVPGYGPPPGPPPPQQGPPPPPGPFPPRPPGPLGPPLTLAPPPHLPGPPPGAPPPAPHVNPAFFPPPTNSGMPTSDSRGPPPTDPYGRPPPY
DRGDYGPPGREMDTARTPLSEAEFEEIMNRNRAISSSAISRAVSDASAGDYGSAIETLVTAISLIKQSKVSADDRCKVLISSLQDCLHGIESKSYGSGSRRERSRERDHSRSREKSRRHKSRSRDRHDDY
YRERSRERERHRDRDRDRDRERDREREYRHR



Isoform 2:
Sequence length:588 aa
Molecular weight:63.471 kDa
Isoelectric point:7.56
Sequence:
1........10........20........30........40........50........60........70........80........90........100.......110.......120.......130
MADGVDHIDIYADVGEEFNQEAEYGGHDQIDLYDDVISPSANNGDAPEDRDYMDTLPPTVGDDVGKGAAPNVVYTYTGKRIALYIGNLTWWTTDEDLTEAVHSLGVNDILEIKFFENRANGQSKGFALVG
VGSEASSKKLMDLLPKRELHGQNPVVTPCNKQFLSQFEMQSRKTTQSGQMSGEGKAGPPGGSSRAAFPQGGRGRGRFPGAVPGGDRFPGPAGPGGPPPPFPGNLIKHLVKGTRPLFLETRIPWHMGHSIE
EIPIFGLKAGQTPPRPPLGPPGPPGPPGPPPPGQVLPPPLAGPPNRGDRPPPPVLFPGQPFGQPPLGPLPPGPPPPVPGYGPPPGPPPPQQGPPPPPGPFPPRPPGPLGPPLTLAPPPHLPGPPPGAPPP
APHVNPAFFPPPTNSGMPTSDSRGPPPTDPYGRPPPYDRGDYGPPGREMDTARTPLSEAEFEEIMNRNRAISSSAISRAVSDASAGDYGSAIETLVTAISLIKQSKVSADDRCKVLISSLQDCLHGIESK
SYGSGSRRERSRERDHSRSREKSRRHKSRSRDRHDDYYRERSRERERHRDRDRDRDRERDREREYRHR



Isoform 3:
Sequence length:478 aa
Molecular weight:52.326 kDa
Isoelectric point:6.18
Sequence:
1........10........20........30........40........50........60........70........80........90........100.......110.......120.......130
MADGVDHIDIYADVGEEFNQEAEYGGHDQIDLYDDVISPSANNGDAPEDRDYMDTLPPTVGDDVGKGAAPNVVYTYTGKRIALYIGNLTWWTTDEDLTEAVHSLGVNDILEIKFFENRANGQSKGFALVG
VGSEASSKKLMDLLPKRELHGQNPVVTPCNKQFLSQFEMQSRKTTQSGQMSGEGKAGPPLAGPPNRGDRPPPPVLFPGQPFGQPPLGPLPPGPPPPVPGYGPPPGPPPPQQGPPPPPGPFPPRPPGPLGP
PLTLAPPPHLPGPPPGAPPPAPHVNPAFFPPPTNSGMPTSDSRGPPPTDPYGRPPPYDRGDYGPPGREMDTARTPLSEAEFEEIMNRNRAISSSAISRAVSDASAGDYGSAIETLVTAISLIKQSKVSAD
DRCKVLISSLQDCLHGIESKSYGSGSRRERSRERDHSRSREKSRRHKSRSRDRHDDYYRERSRERERHRDRDRDRDRERDREREYRHR



Gene location: 12q15


Summary
CPSF6 is a component of the cleavage factor Im complex (CFIm) that plays a key role in pre-mRNA 3'-processing. The interaction of the protein with the RNA is one of the earliest steps in the assembly of the 3' end processing complex and facilitates the recruitment of other processing factors. It has a domain organization reminiscent of spliceosomal proteins. Within the cleavage factor Im complex, the NUDT21/CPSF5 homodimer is at the core of a heterotetramer, and is clasped by two additional subunits (CPSF6 or CPSF7).

Involved in association with NUDT21/CPSF5 in pre-MRNA 3'-end poly(A) site cleavage and poly(A) addition.

The N-terminal region of the 68 kD subunit contains an RNP-type RNA binding domain (RBD), which is necessary for binding to the 25 kD subunit. The C-terminal region of the 68 kD subunit is rich in RS, RD and RE repeats that are similar to pre-mRNA splicing SR proteins. In fact, this region interacts with the spliceosomal SR proteins, and CF Im has been identified as a component of purified spliceosomes.

CPSF6 binds to cleavage and polyadenylation RNA substrates and promotes RNA looping. Component of the cleavage factor Im (CFIm) complex, composed at least of NUDT21/CPSF5 and CPSF6 or CPSF7.

Interacts with NUDT21/CPSF5, SFRS3, SFRS7, SNRNP70 and TRA2B/SFRS10.

Phosphorylated upon DNA damage, probably by ATM or ATR.

See this protein in other databases:
       

Literature:

Additional computationally mapped references ...


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