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Reviewed, UniProtKB/Swiss-Prot O43426 (SYNJ1_HUMAN)

Last modified November 25, 2008. Version 86. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (6) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Synaptojanin-1
    EC=3.1.3.36
Alternative name(s):
    Synaptic inositol-1,4,5-trisphosphate 5-phosphatase 1
Gene names
Name: SYNJ1
Synonyms: KIAA0910
OrganismHomo sapiens (Human)
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length1573 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Inositol 5-phosphatase which has a role in clathrin-mediated endocytosis.

Catalytic activity

1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate + H(2)O = 1-phosphatidyl-1D-myo-inositol 4-phosphate + phosphate.

Subunit structure

Binds AMPH, SH3GL1, SH3GL2 and SH3GL3.

Subcellular location

CytoplasmBy similarity.

Tissue specificity

Concentrated at clathrin-coated endocytic intermediates in nerve terminals. Isoform 1 is more enriched than isoform 2 in developing brain as well as non-neuronal cells. Isoform 2 is very abundant in nerve terminals.

Domain

Binds to EPS15 (a clathrin coat-associated protein) via a C-terminal domain containing three Asn-Pro-Phe (NPF) repeats By similarity.

The C-terminal proline-rich region mediates binding to a variety of SH3 domain-containing proteins including AMPH, SH3GL1, SH3GL2, SH3GL3 and GRB2.

Sequence similarities

Belongs to the synaptojanin family.

In the central section; belongs to the inositol-1,4,5-trisphosphate 5-phosphatase family.

Contains 1 RRM (RNA recognition motif) domain.

Contains 1 SAC domain.

Ontologies

Keywords

   Biological processEndocytosis
   Cellular componentCytoplasm
   Coding sequence diversityAlternative splicing
Polymorphism
   DomainRepeat
   LigandRNA-binding
   Molecular functionHydrolase
   PTMPhosphoprotein
   Technical term3D-structure

Gene Ontology (GO)

   Biological processphosphate metabolic process Ref.1

Traceable author statement. Source: ProtInc

synaptic vesicle endocytosis Ref.1

Traceable author statement. Source: ProtInc

   Molecular functionRNA binding

Inferred from electronic annotation. Source: UniProtKB-KW

inositol-polyphosphate 5-phosphatase activity Ref.1

Traceable author statement. Source: ProtInc

phosphatidylinositol-4,5-bisphosphate 5-phosphatase activity

Inferred from electronic annotation. Source: EC

Complete GO annotation...

Alternative products

This entry describes 4 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: O43426-1)

Also known as: Synaptojanin-170;

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform 2 (identifier: O43426-2)

Also known as: Synaptojanin-145;

The sequence of this isoform differs from the canonical sequence as follows:
     1306-1311: VKTNGI → QEQPSG
     1312-1573: Missing.
Isoform 3 (identifier: O43426-4)

The sequence of this isoform differs from the canonical sequence as follows:
     1094-1159: LPQKDPAQPL...SPGVARREME → PPRPVAPPTRPAPPQRPPPPSGARSPAPTRKEFG
     1306-1311: VKTNGI → QEQPSG
     1312-1573: Missing.
Isoform 4 (identifier: O43426-5)

The sequence of this isoform differs from the canonical sequence as follows:
     451-451: K → KAGK
     504-511: Missing.
     525-1573: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 15731573Synaptojanin-1
PRO_0000209730

Regions

Domain119 – 442324SAC
Domain902 – 97170RRM
Repeat1396 – 139831
Repeat1406 – 140832
Repeat1417 – 141933
Region500 – 899400Catalytic Potential
Region1396 – 1419243 X 3 AA repeats of N-P-F
Compositional bias900 – 1573674Pro-rich
Compositional bias1033 – 10364Poly-Ser
Compositional bias1108 – 11136Poly-Pro
Compositional bias1126 – 11294Poly-Pro
Compositional bias1485 – 14884Poly-Glu
Compositional bias1538 – 15447Poly-Pro

Amino acid modifications

Modified residue7841Phosphotyrosine By similarity
Modified residue7861Phosphotyrosine By similarity
Modified residue10481Phosphothreonine By similarity
Modified residue10531Phosphoserine By similarity
Modified residue10841Phosphoserine By similarity
Modified residue11501Phosphoserine By similarity
Modified residue13451Phosphoserine By similarity
Modified residue13491Phosphothreonine By similarity

Natural variations

Alternative sequence4511K → KAGK in isoform 4.
VSP_035709
Alternative sequence504 – 5118Missing in isoform 4.
VSP_035710
Alternative sequence525 – 15731049Missing in isoform 4.
VSP_035711
Alternative sequence1094 – 115966LPQKD…RREME → PPRPVAPPTRPAPPQRPPPP SGARSPAPTRKEFG in isoform 3.
VSP_016104
Alternative sequence1306 – 13116VKTNGI → QEQPSG in isoform 2 and isoform 3.
VSP_002682
Alternative sequence1312 – 1573262Missing in isoform 2 and isoform 3.
VSP_002683
Natural variant2951K → R: dbSNP rs2254562.
VAR_047308
Natural variant13661V → A: dbSNP rs9980589.
VAR_047309
Natural variant15451L → P: dbSNP rs2230767.
VAR_047310

Experimental info

Sequence conflict13661V → VNT in AAC51922. Ref.1

Secondary structure

............... 1573
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 (Synaptojanin-170) [UniParc].

Last modified November 25, 2008. Version 2.
Checksum: D50B249B1EBFFC18

FASTA1,573173,103
        10         20         30         40         50         60 
MAFSKGFRIY HKLDPPPFSL IVETRHKEEC LMFESGAVAV LSSAEKEAIK GTYSKVLDAY 

        70         80         90        100        110        120 
GLLGVLRLNL GDTMLHYLVL VTGCMSVGKI QESEVFRVTS TEFISLRIDS SDEDRISEVR 

       130        140        150        160        170        180 
KVLNSGNFYF AWSASGISLD LSLNAHRSMQ EQTTDNRFFW NQSLHLHLKH YGVNCDDWLL 

       190        200        210        220        230        240 
RLMCGGVEIR TIYAAHKQAK ACLISRLSCE RAGTRFNVRG TNDDGHVANF VETEQVVYLD 

       250        260        270        280        290        300 
DSVSSFIQIR GSVPLFWEQP GLQVGSHRVR MSRGFEANAP AFDRHFRTLK NLYGKQIIVN 

       310        320        330        340        350        360 
LLGSKEGEHM LSKAFQSHLK ASEHAADIQM VNFDYHQMVK GGKAEKLHSV LKPQVQKFLD 

       370        380        390        400        410        420 
YGFFYFNGSE VQRCQSGTVR TNCLDCLDRT NSVQAFLGLE MLAKQLEALG LAEKPQLVTR 

       430        440        450        460        470        480 
FQEVFRSMWS VNGDSISKIY AGTGALEGKA KLKDGARSVT RTIQNNFFDS SKQEAIDVLL 

       490        500        510        520        530        540 
LGNTLNSDLA DKARALLTTG SLRVSEQTLQ SASSKVLKSM CENFYKYSKP KKIRVCVGTW 

       550        560        570        580        590        600 
NVNGGKQFRS IAFKNQTLTD WLLDAPKLAG IQEFQDKRSK PTDIFAIGFE EMVELNAGNI 

       610        620        630        640        650        660 
VSASTTNQKL WAVELQKTIS RDNKYVLLAS EQLVGVCLFV FIRPQHAPFI RDVAVDTVKT 

       670        680        690        700        710        720 
GMGGATGNKG AVAIRMLFHT TSLCFVCSHF AAGQSQVKER NEDFIEIARK LSFPMGRMLF 

       730        740        750        760        770        780 
SHDYVFWCGD FNYRIDLPNE EVKELIRQQN WDSLIAGDQL INQKNAGQVF RGFLEGKVTF 

       790        800        810        820        830        840 
APTYKYDLFS DDYDTSEKCR TPAWTDRVLW RRRKWPFDRS AEDLDLLNAS FQDESKILYT 

       850        860        870        880        890        900 
WTPGTLLHYG RAELKTSDHR PVVALIDIDI FEVEAEERQN IYKEVIAVQG PPDGTVLVSI 

       910        920        930        940        950        960 
KSSLPENNFF DDALIDELLQ QFASFGEVIL IRFVEDKMWV TFLEGSSALN VLSLNGKELL 

       970        980        990       1000       1010       1020 
NRTITIALKS PDWIKNLEEE MSLEKISIAL PSSTSSTLLG EDAEVAADFD MEGDVDDYSA 

      1030       1040       1050       1060       1070       1080 
EVEELLPQHL QPSSSSGLGT SPSSSPRTSP CQSPTISEGP VPSLPIRPSR APSRTPGPPS 

      1090       1100       1110       1120       1130       1140 
AQSSPIDAQP ATPLPQKDPA QPLEPKRPPP PRPVAPPTRP APPQRPPPPS GARSPAPTRK 

      1150       1160       1170       1180       1190       1200 
EFGGIGAPPS PGVARREMEA PKSPGTTRKD NIGRSQPSPQ AGLAGPGPAG YSTARPTIPP 

      1210       1220       1230       1240       1250       1260 
RAGVISAPQS HARASAGRLT PESQSKTSET SKGSTFLPEP LKPQAAFPPQ SSLPPPAQRL 

      1270       1280       1290       1300       1310       1320 
QEPLVPVAAP MPQSGPQPNL ETPPQPPPRS RSSHSLPSEA SSQPQVKTNG ISDGKRESPL 

      1330       1340       1350       1360       1370       1380 
KIDPFEDLSF NLLAVSKAQL SVQTSPVPTP DPKRLIQLPS ATQSNVLSSV SCMPTMPPIP 

      1390       1400       1410       1420       1430       1440 
ARSQSQENMR SSPNPFITGL TRTNPFSDRT AAPGNPFRAK SEESEATSWF SKEEPVTISP 

      1450       1460       1470       1480       1490       1500 
FPSLQPLGHN KSRASSSLDG FKDSFDLQGQ STLKISNPKG WVTFEEEEDF GVKGKSKSAC 

      1510       1520       1530       1540       1550       1560 
SDLLGNQPSS FSGSNLTLND DWNKGTNVSF CVLPSRRPPP PPVPLLPPGT SPPVDPFTTL 

      1570 
ASKASPTLDF TER 

« Hide

Isoform 2 (Synaptojanin-145) [UniParc].

Checksum: 26F2B693F03D2617
Show »

1,311144,859
Isoform 3 [UniParc].

Checksum: 0704394DF3CB0A21
Show »

1,279141,460
Isoform 4 [UniParc].

Checksum: 9B1ECB57B0D071C9
Show »

51958,068

References

« Hide 'large scale' references
[1]"Synaptojanin 1: localization on coated endocytic intermediates in nerve terminals and interaction of its 170 kDa isoform with Eps15."
Haffner C., Takei K., Chen H., Ringstad N., Hudson A., Butler M.H., Salcini A.E., Di Fiore P.P., De Camilli P.
FEBS Lett. 419:175-180(1997) [PubMed: 9428629] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1 AND 2), VARIANT ARG-295.
Tissue: Cerebellum.
[2]"Prediction of the coding sequences of unidentified human genes. XII. The complete sequences of 100 new cDNA clones from brain which code for large proteins in vitro."
Nagase T., Ishikawa K., Suyama M., Kikuno R., Hirosawa M., Miyajima N., Tanaka A., Kotani H., Nomura N., Ohara O.
DNA Res. 5:355-364(1998) [PubMed: 10048485] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 3).
Tissue: Brain.
[3]"Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones."
Nakajima D., Okazaki N., Yamakawa H., Kikuno R., Ohara O., Nagase T.
DNA Res. 9:99-106(2002) [PubMed: 12168954] [Abstract]
Cited for: SEQUENCE REVISION.
[4]"The DNA sequence of human chromosome 21."
Hattori M., Fujiyama A., Taylor T.D., Watanabe H., Yada T., Park H.-S., Toyoda A., Ishii K., Totoki Y., Choi D.-K., Groner Y., Soeda E., Ohki M., Takagi T., Sakaki Y., Taudien S., Blechschmidt K., Polley A. expand/collapse author list , Menzel U., Delabar J., Kumpf K., Lehmann R., Patterson D., Reichwald K., Rump A., Schillhabel M., Schudy A., Zimmermann W., Rosenthal A., Kudoh J., Shibuya K., Kawasaki K., Asakawa S., Shintani A., Sasaki T., Nagamine K., Mitsuyama S., Antonarakis S.E., Minoshima S., Shimizu N., Nordsiek G., Hornischer K., Brandt P., Scharfe M., Schoen O., Desario A., Reichelt J., Kauer G., Bloecker H., Ramser J., Beck A., Klages S., Hennig S., Riesselmann L., Dagand E., Wehrmeyer S., Borzym K., Gardiner K., Nizetic D., Francis F., Lehrach H., Reinhardt R., Yaspo M.-L.
Nature 405:311-319(2000) [PubMed: 10830953] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[5]"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
The MGC Project Team
Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 4).
Tissue: Placenta.
[6]"The SH3 domains of endophilin and amphiphysin bind to the proline-rich region of synaptojanin 1 at distinct sites that display an unconventional binding specificity."
Cestra G., Castagnoli L., Dente L., Minenkova O., Petrelli A., Migone N., Hoffmueller U., Schneider-Mergener J., Cesareni G.
J. Biol. Chem. 274:32001-32007(1999) [PubMed: 10542231] [Abstract]
Cited for: INTERACTION WITH AMPH; SH3GL1; SH3GL2 AND SH3GL3.
[7]"Solution structure of RNA binding domain in synaptojanin 1."
RIKEN structural genomics initiative (RSGI)
Submitted (OCT-2006) to the PDB data bank
Cited for: STRUCTURE BY NMR OF 894-971.
+Additional computationally mapped references.

Cross-references

Sequence databases

AF009039 mRNA. Translation: AAC51921.1.
AF009040 mRNA. Translation: AAC51922.1.
AB020717 mRNA. Translation: BAA74933.2. Different initiation.
AP000275 Genomic DNA. No translation available.
AP000276 Genomic DNA. No translation available.
AP000277 Genomic DNA. No translation available.
AP000278 Genomic DNA. No translation available.
AP000279 Genomic DNA. No translation available.
BC098395 mRNA. Translation: AAH98395.1.
RefSeqNP_003886.2.
NP_982271.1.
UniGeneHs.473632

3D structure databases

EntryMethodResolution (Å)ChainPositionsPDBsum
1W80X-ray1.90P1477-1488[»]
Q1458-1469[»]
2DNRNMR-A894-971[»]
2VJ0X-ray1.60P1477-1488[»]
ModBaseSearch...

PTM databases

PhosphoSiteO43426.

Genome annotation databases

EnsemblENSG00000159082. Homo sapiens. [Contig view]
GeneID8867.
KEGGhsa:8867.

Organism-specific databases