The present invention refers to a polynucleotide comprising the nucleic acid sequence as depicted in SEQ ID NO:1, 2 or 3 or the fragment or derivative thereof, or a polynucleotide hybridizing with the nucleic acid sequence as depicted in SEQ ID NO:1, 2 or 3. The present invention further refers to polypeptides encoded by the nucleic acid sequence or the fragment or derivative thereof as depicted in SEQ ID NO:1, 2 or 3. The polynucleotides and polypeptides may be used as medicaments, vaccines or diagnostic substances, preferably for the treatment, prevention or diagnostic of HIV infections.