Summary for PCNA (NES ID: 250)

Full Name
Proliferating cell nuclear antigen     UniProt    
Alternative Names
Cyclin   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L12A/L16A/L19A/L22A
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
11ILKKVLEALKDLI23
Secondary Structure of Export Signal
Unknown
Other Residues Important for Export
Unknown
Sequence
Show FASTA Format Show Domain Info by CDD Show Secondary Structure by PSIPRED Show Conservation Score by AL2CO
10 20 30 40 50 60
MFEARLVQGS ILKKVLEALK DLINEACWDI SSSGVNLQSM DSSHVSLVQL TLRSEGFDTY
70 80 90 100 110 120
RCDRNLAMGV NLTSMSKILK CAGNEDIITL RAEDNADTLA LVFEAPNQEK VSDYEMKLMD
130 140 150 160 170 180
LDVEQLGIPE QEYSCVVKMP SGEFARICRD LSHIGDAVVI SCAKDGVKFS ASGELGNGNI
190 200 210 220 230 240
KLSQTSNVDK EEEAVTIEMN EPVQLTFALR YLNFFTKATP LSSTVTLSMS ADVPLVVEYK
250 260
IADMGHLKYY LAPKIEDEEG
3D Structures in PDB
1AXC (X-Ray,2.60 Å resolution)
Comments
The proliferating cell nuclear antigen (PCNA) is a member of DNA sliding clamp family of proteins and functions in cell cycle progression, DNA replication and DNA repair. PCNA protein acts as a homotrimer and helps increase the processivity of leading strand synthesis during DNA replication. PCNA protein expression and its granular/nucleoli distribution are a well-accepted marker of proliferation. However, in neutrophils, PCNA was localized exclusively in the cytoplasm due to its nuclear-to-cytoplasmic relocalization during granulocytic differentiation. The NES defined in the study of Bouayad et. al is located within the internal face of the PCNA trimer and within the DNA-interacting domain of PCNA. Thus due to its localization within the trimer, NES could not bind CRM1 in trimeric PCNA.
References
[1]. "Nuclear-to-cytoplasmic Relocalization of the Proliferating Cell Nuclear Antigen (PCNA) during Differentiation Involves a Chromosome Region Maintenance 1 (CRM1)-dependent Export and Is a Prerequisite for PCNA Antiapoptotic Activity in Mature Neutrophils"
Bouayad D, Pederzoli-Ribeil M, Mocek J, Candalh C, Arlet JB, Hermine O, Reuter N, Davezac N, Witko-Sarsat V. (2012) J Biol Chem, 287(40):33812-25 PubMed
User Input
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