http://www.ganb.uscourts.gov/court-info/faq/understanding_bankruptcy/faqs

The United States Trustee (“U.S. Trustee”) is an officer of the U.S. Department of Justice responsible for supervising the administration of bankruptcy cases, estates, and case trustees, and for monitoring plans and disclosure statements, monitoring Chapter 11 creditors’ committees, monitoring fee applications, and performing other statutory duties. The U.S. Trustee is not a case trustee and does not administer any debtor's estate. For more information, visit www.justice.gov/ust/