Mickey Arthur today blamed "differences" between himself and Cricket South Africa for his his decision to step down as Proteas coach.
The 41-year-old today confirmed he had resigned from the post he has held since May 2005, with high performance centre director Corrie van Zyl handed the reins while a replacement is sought.
"I've decided to resign as national coach of the Proteas with immediate effect as I feel it is of the best interests of me and the team," Arthur told a specially arranged press conference in East London.
"Differences have arisen between the board of Cricket South Africa and me and I don't believe I can take the team forward under the present circumstances.
"There comes a time when you have to move on and I know in my own mind that I've taken the right decision. It is never a bad thing to have a fresh pair of legs running the show and I wish my successor all the best in his endeavours."
Van Zyl will lead South Africa during their tour of India next month.
It was also announced that members of the national selection committee, including Mike Procter, had been relieved of their duties as part of the restructuring process.
The convener will be replaced by CSA CEO Gerald Majola, who is a former member of the national selection panel, the new interim boss Van Zyl and former captain Kepler Wessels.
Majola said: "The board accepted his (Arthur's) resignation, which came following the normal stocktaking process after the England series and against the backdrop of some disappointing results.
"As this process unfolded and remedies were sought, Mickey expressed a very honest and humble view that he did not believe at this stage he could continue as coach of the Proteas.
"The board wishes to thank Mickey for his great contribution to the advancement of the Proteas to the point where in 2008/09 they had their best season ever and finished on top of the world Test and ODI rankings."
Captain Graeme Smith admitted hearing of Arthur's departure when the news initially broke yesterday had left him upset, especially because early reports had pointed towards a breakdown in their own relationship as the main reason for the coach to walk out.
"Yesterday was a tough day for me," he added. "Not only from the media reports, but also Mickey resigning had affected me.
"The two of us have had a great partnership over the last five years, obviously a captain-coach relationship is crucial. I think Mickey was integral to bringing a lot of stability to the team, calmness, and he can be very proud of what he's achieved as coach.
"I really believe, as a captain, I've given Mickey my full support. I mean, we've really done everything to bring the best out of the team working together."