/usr/bin/pecl is available from the php-pear package.
The dependency errors you received are volatile. Probably because you have a mixed installation of php-* 5.1 RPM and php53-* 5.3 RPM and there are conflicts in the devel files. You need to do some cleanup to save only one RPM set for your target version: 5.1 or 5.3.
You also need to install gcc , httpd-devel , php(53)-devel and finally php-pear to get phpize .
Then you can run pecl install apc
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