How to update BP data

Hi All,

I have a scenario here where we are fetching business partner related data from a non SAP system and matching it with the data present in our system. If it is not matching we have to update/change it in our system. The fields which are used for matching are

1. First name 2. Last name 3. email 4.mob no 5.tel. no 6. business unit 7. functional area 8. country

Please let me know how to achieve this.Is there some BAPI which can update all these fields?

Thanks in advance,

Saket