Src Homology 3 domain of Melanoma Inhibitory Activity 2 protein; MIA2 is expressed specifically in hepatocytes and its expression is controlled by hepatocyte nuclear factor 1 binding sites in the MIA2 promoter. It inhibits the growth and invasion of hepatocellular carcinomas (HCC) and may act as a tumor suppressor. A mutation in MIA2 in mice resulted in reduced cholesterol and triglycerides. Since MIA2 localizes to ER exit sites, it may function as an ER-to-Golgi trafficking protein that regulates lipid metabolism. MIA2 contains an N-terminal SH3-like domain, similar to MIA. It is a member of the recently identified family that also includes MIA, MIAL, and MIA3 (also called TANGO). MIA is a single domain protein that adopts a SH3 domain-like fold; it contains an additional antiparallel beta sheet and two disulfide bonds compared to classical SH3 domains. Unlike classical SH3 domains, MIA does not bind proline-rich ligands.

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                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 46094009  31 KCGDLECEALINRVSAMRDYRGPDCRYLNFTKGEEISVYVKLAGEREDLWAGSKGKEFGYFPRDAVQIEEVFI 103
Cdd:cd11892   1 KCGDPECERLMSRVQAIRDYRGPDCRYLSFKKGDEIIVYYKLSGKREDLWAGSTGKEFGYFPKDAVKVEEVYI 73

Src Homology 3 domain of Melanoma Inhibitory Activity 2 protein; MIA2 is expressed specifically in hepatocytes and its expression is controlled by hepatocyte nuclear factor 1 binding sites in the MIA2 promoter. It inhibits the growth and invasion of hepatocellular carcinomas (HCC) and may act as a tumor suppressor. A mutation in MIA2 in mice resulted in reduced cholesterol and triglycerides. Since MIA2 localizes to ER exit sites, it may function as an ER-to-Golgi trafficking protein that regulates lipid metabolism. MIA2 contains an N-terminal SH3-like domain, similar to MIA. It is a member of the recently identified family that also includes MIA, MIAL, and MIA3 (also called TANGO). MIA is a single domain protein that adopts a SH3 domain-like fold; it contains an additional antiparallel beta sheet and two disulfide bonds compared to classical SH3 domains. Unlike classical SH3 domains, MIA does not bind proline-rich ligands.

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                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 46094009  31 KCGDLECEALINRVSAMRDYRGPDCRYLNFTKGEEISVYVKLAGEREDLWAGSKGKEFGYFPRDAVQIEEVFI 103
Cdd:cd11892   1 KCGDPECERLMSRVQAIRDYRGPDCRYLSFKKGDEIIVYYKLSGKREDLWAGSTGKEFGYFPKDAVKVEEVYI 73

Src Homology 3 domain of Melanoma Inhibitory Activity 2 protein; MIA2 is expressed specifically in hepatocytes and its expression is controlled by hepatocyte nuclear factor 1 binding sites in the MIA2 promoter. It inhibits the growth and invasion of hepatocellular carcinomas (HCC) and may act as a tumor suppressor. A mutation in MIA2 in mice resulted in reduced cholesterol and triglycerides. Since MIA2 localizes to ER exit sites, it may function as an ER-to-Golgi trafficking protein that regulates lipid metabolism. MIA2 contains an N-terminal SH3-like domain, similar to MIA. It is a member of the recently identified family that also includes MIA, MIAL, and MIA3 (also called TANGO). MIA is a single domain protein that adopts a SH3 domain-like fold; it contains an additional antiparallel beta sheet and two disulfide bonds compared to classical SH3 domains. Unlike classical SH3 domains, MIA does not bind proline-rich ligands.

                        10        20        30        40        50        60        70
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|...
gi 46094009  31 KCGDLECEALINRVSAMRDYRGPDCRYLNFTKGEEISVYVKLAGEREDLWAGSKGKEFGYFPRDAVQIEEVFI 103
Cdd:cd11892   1 KCGDPECERLMSRVQAIRDYRGPDCRYLSFKKGDEIIVYYKLSGKREDLWAGSTGKEFGYFPKDAVKVEEVYI 73

Src Homology 3 domain of Melanoma Inhibitory Activity 3 protein; MIA3, also called TANGO or TANGO1, acts as a tumor suppressor of malignant melanoma. It is downregulated or lost in melanoma cells lines. Unlike other MIA family members, MIA3 is widely expressed except in hematopoietic cells. MIA3 is an ER resident transmembrane protein that is required for the loading of collagen VII into transport vesicles. SNPs in the MIA3 gene have been associated with coronary arterial disease and myocardial infarction. MIA3 contains an N-terminal SH3-like domain, similar to MIA. It is a member of the recently identified family that also includes MIA, MIAL, and MIA2. MIA is a single domain protein that adopts a SH3 domain-like fold; it contains an additional antiparallel beta sheet and two disulfide bonds compared to classical SH3 domains. Unlike classical SH3 domains, MIA does not bind proline-rich ligands.

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                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 46094009  31 KCGDLECEALINRVSAMRDYRGPDCRYLNFTKGEEISVYVKLAGEREDLWAGSKGKEFGYFPRDAVQIEEVF 102
Cdd:cd11893   1 RCADEECSMLLCRGKAVKDFTGPDCRFLSFKKGETIYVYYKLSGRRTDLWAGSVGFDFGYFPKDLLDVNHLY 72

Melanoma Inhibitory Activity-Like protein; MIAL is specifically expressed in the cochlea and the vestibule of the inner ear and may contribute to inner ear dysfunction in humans. MIAL is a member of the recently identified family that also includes MIA, MIA2, and MIA3 (also called TANGO); MIA is the most studied member of the family. MIA is a single domain protein that adopts a Src Homology 3 (SH3) domain-like fold; it contains an additional antiparallel beta sheet and two disulfide bonds compared to classical SH3 domains. MIA is secreted from malignant melanoma cells and it plays an important role in melanoma development and invasion. MIA is expressed by chondrocytes in normal tissues and may be important in the cartilage cell phenotype. Unlike classical SH3 domains, MIA does not bind proline-rich ligands.

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                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 46094009  32 CGDLECEALINRVSAMRDYRGPDCRYLNFTKGEEISVYVKLAGERE--DLWAGSKGKE--------FGYFPRDAVQIEEV 101
Cdd:cd11891   2 CADEECVYAISLARAEDDYNAPDCRFINIKKGQLIYVYSKLVKENGagEFWSGSVYSEryvdqmgiVGYFPSNLVKEQTV 81

                .
gi 46094009 102 F 102
Cdd:cd11891  82 Y 82

Src Homology 3 domain of Myosin XV; This subfamily is composed of proteins with similarity to Myosin XVa. Myosin XVa is an unconventional myosin that is critical for the normal growth of mechanosensory stereocilia of inner ear hair cells. Mutations in the myosin XVa gene are associated with nonsyndromic hearing loss. Myosin XVa contains a unique N-terminal extension followed by a motor domain, light chain-binding IQ motifs, and a tail consisting of a pair of MyTH4-FERM tandems separated by a SH3 domain, and a PDZ domain. SH3 domains bind to proline-rich ligands with moderate affinity and selectivity, preferentially to PxxP motifs; they play a role in the regulation of enzymes by intramolecular interactions, changing the subcellular localization of signal pathway components and mediate multiprotein complex assemblies.

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                ....*....|....*....|....*....|....*....|....*....|....*
gi 46094009  44 VSAMRDYRGPDCRYLNFTKGEEISVyVKLAGEREDLWA-GSKGKEFGYFPRDAVQ 97
Cdd:cd11884   2 VVAVRAYITRDQTLLSFHKGDVIKL-LPKEGPLDPGWLfGTLDGRSGAFPKEYVQ 55