SH3結構域(英語:SH3 domain,全稱Src同源3結構域,英語:SRC Homology 3 Domain)是最早在病毒接頭蛋白v-Crk及酪氨酸激酶SrcAbl中發現的長約60個氨基酸殘基的保守結構域[1][2],在磷酸肌醇3-激酶Ras超家族G蛋白cdc25中也存在[3][4][5]

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SH3 domain
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α-血影蛋白的SH3結構域的飄帶圖,PDB代碼1SHG,N-端為藍色,C-端為紅色
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標誌SH3_1
PfamPF00018舊版
Pfam宗系CL0010舊版
InterPro英語InterProIPR001452
SMART英語Simple Modular Architecture Research ToolSM00326
PROSITE英語PROSITEPS50002
SCOP英語Structural Classification of Proteins1shf / SUPFAM
CDD英語Conserved Domain Databasecd00174
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