Summary for Mta (NES ID: 71)

Full Name
mRNA export factor EB2     UniProt    
Alternative Names
Protein SM   
Organism
Epstein-Barr virus (strain B95-8) (HHV-4) (Human herpesvirus 4)    
Experimental Evidence for CRM1-mediated Export
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
V225A/T226A/L227A/L234A/T235A/L236A Ref.1Properties of two EBV Mta nuclear export signal sequences, Chen et al., Virology, 2001
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
218PVSKITFVTL227, 227LPSPLASLTL236 Ref.1Properties of two EBV Mta nuclear export signal sequences, Chen et al., Virology, 2001
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
MVPSQRLSRT SSISSNEDPA ESHILELEAV SDTNTDCDLD PMEGSEEHST DGEISSSEEE
70 80 90 100 110 120
DEDPTPAHAI PARPSSVVIT PTSASFVIPR KKWDLQDKTV TLHRSPLCRD EDEKEETGNS
130 140 150 160 170 180
SYTRGHKRRR GEVHGCTDES YGKRRHLPPG ARAPRAPRAP RVPRAPRSPR APRSNRATRG
190 200 210 220 230 240
PRSESRGAGR STRKQARQER SQRPLPNKPW FDMSLVKPVS KITFVTLPSP LASLTLEPIQ
250 260 270 280 290 300
DPFLQSMLAV AAHPEIGAWQ KVQPRHELRR SYKTLREFFT KSTNKDTWLD ARMQAIQNAG
310 320 330 340 350 360
LCTLVAMLEE TIFWLQEITY HGDLPLAPAE DILLACAMSL SKVILTKLKE LAPCFLPNTR
370 380 390 400 410 420
DYNFVKQLFY ITCATARQNK VVETLSSSYV KQPLCLLAAY AAVAPAYINA NCRRRHDEVE
430 440 450 460 470
FLGHYIKNYN PGTLSSLLTE AVETHTRDCR SASCSRLVRA ILSPGTGSLG LFFVPGLNQ
3D Structures in PDB
Not Available
Comments
Mta is a regulatory protein that controls the lytic gene expression in Epstein-Bar virus. Mta has been shown to shuttle between the nucleus and the cytoplasm in heterokaryon assays. Chen et al. identified two consecutive putative NES in Mta (residues 227-236, and 218-227). Only deletion of the two NES regions and simultaneous mutations of both NES can abolish the shuttling. They further showed that both the aa 177-185 and aa 186-195 motifs were independently capable of conferring a cytoplasmic export function to a nuclear protein (GFP-NLS-PK). The export is sensitive to LMB treatment. The mutant NES are unable to mediate cytoplasmic accumulation of unspliced mRNA.
References
[1]. "Properties of two EBV Mta nuclear export signal sequences"
Chen, L., Liao, G., Fujimuro, M., Semmes, O.J., Hayward, S.D. (2001) Virology, 288:119-128 PubMed
User Input
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