The stability of nanowire is confirmed by the sustainable value of cohesive energy. The linear AuNW is formed by a partly ionic and covalent bond between gold atoms. The electronic band structure has shown that AuNW is metallic with multiple flat bands in different energy ranges. Additionally, the structural and electronic properties are found to be influenced by the external strain. Plus, the tensile stiffness value has confirmed the mechanical strength and stability of the wire. The currentvoltage plot has shown the Ohomic behavior until the current gets saturated. The influence of external strain on transport properties is not covered in this work. The tuning of the current-voltage relation is also may be possible in the future. Hence, our finding confirms that monoatomic ultra-thin gold nanowire is a potential candidate in electronics, nanomechanical, and transport applications.