| UniProtSummary | FUNCTION:SwissProt:P55268#Bindingtocellsviaahighaffinityreceptor,lamininisthoughttomediatetheattachment,migrationandorganizationofcellsintotissuesduringembryonicdevelopmentbyinteractingwithotherextracellularmatrixcomponents. SIZE:1798aminoacids;195981Da
 SUBUNIT:Lamininisacomplexglycoprotein,consistingofthreedifferentpolypeptidechains(alpha,beta,gamma),whichareboundtoeachotherbydisulfidebondsintoacross-shapedmoleculecomprisingonelongandthreeshortarmswithglobulesateachend.Beta-2isasubunitoflaminin-3(S-laminin),laminin-4(S-merosin),andlaminin-7(KS-laminin).
 SUBCELLULARLOCATION:Secreted,extracellularspace.Note=S-lamininisconcentratedinthesynapticcleftoftheneuromuscularjunction.
 DOMAIN:SwissProt:P55268Thealpha-helicaldomainsIandIIarethoughttointeractwithotherlamininchainstoformacoiledcoilstructure.&DomainsVIandIVareglobular.
 DISEASE:SwissProt:P55268#DefectsinLAMB2arethecauseofPiersonsyndrome[MIM:609049];alsoknownasmicrocoria-congenitalnephroticsyndrome.Piersonsyndromeischaracterizedbynephroticsyndromewithneonatalonset,diffusemesangialsclerosisandeyeabnormalitieswithmicrocoriaastheleADIngclinicalfeature.Deathusuallyoccurswithinthefirstweeksoflife.Diseaseseveritydependsonthemutationtype:nontruncatingLAMB2mutationsmaydisplayvariablephenotypesrangingfromamildervariantofPiersonsyndrometoisolatedcongenitalnephroticsyndrome.&DefectsinLAMB2areacauseofcongenitalnephroticsyndrome[MIM:609049].Congenitalnephroticsyndromeconstitutesaheterogeneousgroupofconditionshavingincommonthedisruptionofnormalglomerularpermselectivity.CongenitalnephroticsyndromeduetoLAMB2mutationsmaybeassociatedwithocularabnormalities.
 SIMILARITY:Contains13lamininEGF-likedomains.&Contains1lamininIVtypeBdomain.&Contains1lamininN-terminaldomain.
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