UPDATE, 3/17/11: Borders said it will close another 28 stores by late May. Here is the updated closures list.

Borders filed for bankruptcy protection this morning, and said it will close at least 200 stores, plus the option for about 75 more -- or about 30% of the company's total.

The list of store closures includes locations from Alaska to Florida, to Borders' home state of Michigan. In a court filing, an adviser for Borders said the stores slated for closure, plus others, are costing Borders about $2 million a week in losses.

Borders in coming weeks is planning to hold going-out-of-business sales at the affected locations.

MORE: Everything You Need to Know about the Borders Bankruptcy.