Summary for SPAST (NES ID: 245)

Full Name
Spastin     UniProt    
Alternative Names
Spastic paraplegia 4 protein, SPG4   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
Mutations That Affect Nuclear Export
Mutations That Affect CRM1 Binding
Functional Export Signals
Undetermined
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
MNSPGGRGKK KGSGGASNPV PPRPPPPCLA PAPPAAGPAP PPESPHKRNL YYFSYPLFVG
70 80 90 100 110 120
FALLRLVAFH LGLLFVWLCQ RFSRALMAAK RSSGAAPAPA SASAPAPVPG GEAERVRVFH
130 140 150 160 170 180
KQAFEYISIA LRIDEDEKAG QKEQAVEWYK KGIEELEKGI AVIVTGQGEQ CERARRLQAK
190 200 210 220 230 240
MMTNLVMAKD RLQLLEKMQP VLPFSKSQTD VYNDSTNLAC RNGHLQSESG AVPKRKDPLT
250 260 270 280 290 300
HTSNSLPRSK TVMKTGSAGL SGHHRAPSYS GLSMVSGVKQ GSGPAPTTHK GTPKTNRTNK
310 320 330 340 350 360
PSTPTTATRK KKDLKNFRNV DSNLANLIMN EIVDNGTAVK FDDIAGQDLA KQALQEIVIL
370 380 390 400 410 420
PSLRPELFTG LRAPARGLLL FGPPGNGKTM LAKAVAAESN ATFFNISAAS LTSKYVGEGE
430 440 450 460 470 480
KLVRALFAVA RELQPSIIFI DEVDSLLCER REGEHDASRR LKTEFLIEFD GVQSAGDDRV
490 500 510 520 530 540
LVMGATNRPQ ELDEAVLRRF IKRVYVSLPN EETRLLLLKN LLCKQGSPLT QKELAQLARM
550 560 570 580 590 600
TDGYSGSDLT ALAKDAALGP IRELKPEQVK NMSASEMRNI RLSDFTESLK KIKRSVSPQT
610
LEAYIRWNKD FGDTTV
3D Structures in PDB
3EAB (X-ray,2.50 Å resolution)
5Z6Q (X-ray,3.00 Å resolution)
6PEK (CryoEM,4.20 Å resolution)
Comments
Spastin is a microtubule-severing AAA ATPase which plays key roles in regulating microtubule dynamics. Sakoe et al. reported that isoforms M1 and M87 are both found to be shuttling proteins which contain predicted NLS and NES sequences. The M1 isoform, is found primarily in the cytoplasm anchored to the ER, while the M87 isoform is found in both the cytoplasm and nucleus. A putative NES (aa 195-204) was identified in the coiled-coil and exon4 region by truncation analysis. Mutations to residues 195/202 and LMB treatment showed reduced cytoplasmic localization as well as microtubule fragmentation in the M87. CRM1-binding is illustrated by co-IP and alanine mutation to 195/202 reduced but did not abolish CRM1 binding. Ref.1A newly identified NES sequence present in spastin regulates its subcellular localization and microtubule severing activity, Sakoe et al., Biochim Biophys Acta Mol Cell Res., 2020
References
[1]. "A newly identified NES sequence present in spastin regulates its subcellular localization and microtubule severing activity"
Sakoe K, Shioda N, Matsuura T. (2020) Biochim Biophys Acta Mol Cell Res., 118862:1868(1) PubMed
User Input
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