PTM - dbPAF Gene Name UniProt ID Position Type Species Kif21a; Kiaa1708 Q9QXL2 1121 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1122 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1130 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1133 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1139 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1159 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1160 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1161 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1227 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1230 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1231 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1241 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1244 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1273 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1276 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1277 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1280 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1314 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1660 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1662 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 1671 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 255 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 258 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 524 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 526 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 571 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 581 T Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 669 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 80 Y Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 843 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 855 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 856 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 857 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 859 S Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 87 Y Mus musculus(Mouse) Kif21a; Kiaa1708 Q9QXL2 880 T Mus musculus(Mouse)

PTM - PhosphositePlus UniProt ID MOD_RSD Type SITE_+/-7_AA Q9QXL2 K909-ac Acetylation TRKKYQRkGFTGRVF Q9QXL2 Y80-p Phosphorylation IEGCFEGyNATVFAy Q9QXL2 Y87-p Phosphorylation yNATVFAyGQTGAGK Q9QXL2 S258-p Phosphorylation NKLISESsPMNEFET Q9QXL2 S278-p Phosphorylation HFVDLAGsERLKRTG Q9QXL2 S524-p Phosphorylation FSASSAFsPTILSSD Q9QXL2 S571-p Phosphorylation ESGREERsVAGKDDN Q9QXL2 T581-p Phosphorylation GKDDNADtDQEKKEE Q9QXL2 S669-p Phosphorylation LIDELENsQKRLQTL Q9QXL2 S843-p Phosphorylation RRQVRPMsDKVAGKV Q9QXL2 T851-p Phosphorylation DKVAGKVtRKLsssE Q9QXL2 S855-p Phosphorylation GKVtRKLsssEsPAP Q9QXL2 S856-p Phosphorylation KVtRKLsssEsPAPD Q9QXL2 S857-p Phosphorylation VtRKLsssEsPAPDT Q9QXL2 S859-p Phosphorylation RKLsssEsPAPDTGS Q9QXL2 S1121-p Phosphorylation PPENEEDssEEDGPL Q9QXL2 S1122-p Phosphorylation PENEEDssEEDGPLH Q9QXL2 S1130-p Phosphorylation EEDGPLHsPGsEGST Q9QXL2 S1133-p Phosphorylation GPLHsPGsEGSTLSS Q9QXL2 T1159-p Phosphorylation KNKARRRtttQMELL Q9QXL2 T1160-p Phosphorylation NKARRRtttQMELLY Q9QXL2 T1161-p Phosphorylation KARRRtttQMELLYA Q9QXL2 S1227-p Phosphorylation PSKIGSIsRQssLSE Q9QXL2 S1230-p Phosphorylation IGSIsRQssLSEKKV Q9QXL2 S1231-p Phosphorylation GSIsRQssLSEKKVP Q9QXL2 S1241-p Phosphorylation EKKVPEPsPVtRRKA Q9QXL2 T1244-p Phosphorylation VPEPsPVtRRKAYEK Q9QXL2 S1273-p Phosphorylation GASETSLsPPSsPPS Q9QXL2 S1277-p Phosphorylation TSLsPPSsPPSRPRN Q9QXL2 S1314-p Phosphorylation DESDSSLsEVHRGII Q9QXL2 S1660-p Phosphorylation NLQDGQLsDtGDLGE Q9QXL2 T1662-p Phosphorylation QDGQLsDtGDLGEDI Q9QXL2 S1671-p Phosphorylation DLGEDIAsN______ Q9QXL2 K749-ub Ubiquitination KEHARLLkNQSQYEK Q9QXL2 K1060-ub Ubiquitination KGLQAAQkEAQIKVL

PTM - dbPTM UniProt ID Position Code Type Resources References Q9QXL2 80 Y Phosphorylation Swiss-Prot 1010711 17203969 Q9QXL2 87 Y Phosphorylation Swiss-Prot 1010711 17203969 Q9QXL2 1660 S Phosphorylation Swiss-Prot 1010711 17242355 Q9QXL2 1671 S Phosphorylation Swiss-Prot 1010711 17242355 Q9QXL2 1660 S Phosphorylation PhosphoELM.10011 17242355 Q9QXL2 1671 S Phosphorylation PhosphoELM.10011 17242355 Q9QXL2 80 Y Phosphorylation PhosphoELM.10011 17203969 Q9QXL2 87 Y Phosphorylation PhosphoELM.10011 17203969 Q9QXL2 1241 S Phosphorylation Phosphositeplus.1010730 21183079 Q9QXL2 1273 S Phosphorylation Phosphositeplus.1010730 20415495;21183079 Q9QXL2 1277 S Phosphorylation Phosphositeplus.1010730 20415495;21183079 Q9QXL2 1280 S Phosphorylation Phosphositeplus.1010730 21183079 Q9QXL2 1660 S Phosphorylation Phosphositeplus.1010730 17242355;20415495;21183079 Q9QXL2 1671 S Phosphorylation Phosphositeplus.1010730 17242355;20415495;21183079 Q9QXL2 258 S Phosphorylation Phosphositeplus.1010730 18056256;19737024;20415495;21183079 Q9QXL2 524 S Phosphorylation Phosphositeplus.1010730 20415495 Q9QXL2 855 S Phosphorylation Phosphositeplus.1010730 19367708;21183079;21659605 Q9QXL2 1244 T Phosphorylation Phosphositeplus.1010730 21183079 Q9QXL2 1662 T Phosphorylation Phosphositeplus.1010730 17242355 Q9QXL2 581 T Phosphorylation Phosphositeplus.1010730 19367708 Q9QXL2 80 Y Phosphorylation Phosphositeplus.1010730 17203969 Q9QXL2 87 Y Phosphorylation Phosphositeplus.1010730 17203969 Q9QXL2 855 S Phosphorylation SysPTM 1.1 18846507 Q9QXL2 1241 S Phosphorylation SysPTM 1.1 18846507 Q9QXL2 1660 S Phosphorylation SysPTM 1.1 17242355 Q9QXL2 1671 S Phosphorylation SysPTM 1.1 17242355 Q9QXL2 1662 T Phosphorylation SysPTM 1.1 17242355 Q9QXL2 80 Y Phosphorylation SysPTM 1.1 17203969 Q9QXL2 87 Y Phosphorylation SysPTM 1.1 17203969

PTM - Phospho.ELM UniProt Position Code PMIDs Kinase Source Type Q9QXL2 1671 S 17242355 HTP Phosphorylation Q9QXL2 80 Y 17203969 HTP Phosphorylation Q9QXL2 1660 S 17242355 HTP Phosphorylation Q9QXL2 87 Y 17203969 HTP Phosphorylation

PTM - UniProt UniProt ID Position Type PMIDs Q9QXL2 258 Phosphoserine 21183079 Q9QXL2 1660 Phosphoserine 17242355;21183079 Q9QXL2 1671 Phosphoserine 17242355;21183079

PTM - PHOSIDA Symbol Accession Code Position Surrounding Sequence Type Kif21a IPI00454081 S 1241 KKVPEPpSPVTRRK phosphorylation Kif21a IPI00454081 S 1273 ASETSLpSPPSSPP phosphorylation Kif21a IPI00454081 S 1276 TSLSPPpSSPPSRP phosphorylation Kif21a IPI00454081 S 1277 SLSPPSpSPPSRPR phosphorylation Kif21a IPI00454081 S 1660 LQDGQLpSDTGDLG phosphorylation Kif21a IPI00454081 S 1671 LGEDIApSN_____ phosphorylation Kif21a IPI00454081 S 255 TDNKLIpSESSPMN phosphorylation Kif21a IPI00454081 S 258 KLISESpSPMNEFE phosphorylation Kif21a IPI00454081 S 524 SASSAFpSPTILSS phosphorylation Kif21a IPI00454081 S 855 KVTRKLpSSSESPA phosphorylation Kif21a IPI00454081 T 1244 PEPSPVpTRRKAYE phosphorylation Kif21a IPI00454081 T 526 SSAFSPpTILSSDK phosphorylation Kif21a IPI00454081 T 581 KDDNADpTDQEKKE phosphorylation Kif21a IPI00454082 S 1205 LPSKIGpSMSDESD phosphorylation Kif21a IPI00454082 S 1207 SKIGSMpSDESDSS phosphorylation Kif21a IPI00454082 S 1213 SDESDSpSLSEVHR phosphorylation Kif21a IPI00869453 S 1228 SLSPPSpSPPSRPR phosphorylation

PTM - mUbiSiDa Gene Name Species Ubiquitination Site Ubiquitination Sequence Evidence PMID Kif21a Mus musculus (Mouse) 1060; 749 "1060,GLQAAQKEAQIKV; 749,EHARLLKNQSQYE" 1060:22790023; 749:22790023