Fórum estou com problema com o pdo #552060

$usuario 	= $_POST["userCadastro"];
$senha 		= $_POST["passCadastro"];
$email 		= $_POST["emailCadastro"];

$verificaEmail = $cn->prepare("SELECT * FROM usuarios WHERE email=':email'");
$verificaEmail->bindValue(":email",$email);
$verificaEmail->execute();
$row = $verificaEmail->rowCount();
if($row == 1){ echo "esse email ja esta em uso"; exit;}

$verificaEmail->bindValue(":email",$email);

$verificaEmail = $cn->prepare("SELECT * FROM usuarios WHERE email='$email");