Abstract: The present invention relates to a recombinant Bacillus host cell containing a recombinant vector including a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronan synthase (HAS). The recombinant Bacillus host cell is utilized in a method for producing hyaluronic acid (HA).

Abstract: The present invention relates to a recombinant Bacillus host cell containing a recombinant vector including a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronan synthase (HAS). The recombinant Bacillus host cell is utilized in a method for producing hyaluronic acid (HA).

Abstract: The present invention relates to a recombinant Bacillus host cell containing a recombinant vector including a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronan synthase (HAS). The recombinant Bacillus host cell is utilized in a method for producing hyaluronic acid (HA).

Abstract: A purified nucleic acid segment encoding a functionally active hyaluronan receptor for endocytosis (HARE) or an active peptide fragment thereof, and methods for producing functionally active HARE or an active peptide fragment thereof therefrom, wherein the functionally active HARE or an active peptide fragment thereof is able to specifically bind HA, chondroitin and chondroitin sulfate.

Abstract: The present invention relates to a recombinantly produced, enzymatically active hyaluronan synthase, wherein the recombinantly produced, enzymatically active hyaluronan synthase is a single protein that is a dual-action catalyst that utilizes UDP-GlcA and UDP-GlcNAc to synthesize HA. The recombinantly produced, enzymatically active hyaluronan synthase may be produced from a hyaluronan synthase gene isolated from a microbial source, such as a streptococcal source.

Abstract: Disclosed are DNA sequences encoding hyaluronic acid synthase that are employed to construct recombinant cells useful in the production of hyaluronata synthase and hyaluronic acid (HA). In preferred aspects, chromosomal DNA encoding the HA synthase gene, hasA, was cloned from a Streptococcus pyoganas genomic library. These vectors were used to transform host cells such as E. coli and acapsular Streptococci to produce hyaluronic acid. Resultant transformants were screened to identify colonies which have incorporated HA synthase DNA in a form that is being actively transcribed into the corresponding HA synthase enzyme. These colonies were selected and employed in the production of hyaluronic acid.

Abstract: The present invention relates to a recombinant Bacillus host cell containing a recombinant vector including a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronan synthase (HAS). The recombinant Bacillus host cell is utilized in a method for producing hyaluronic acid (HA).

Abstract: The present invention relates to a method of producing hyaluronic acid that includes introducing a purified nucleic acid segment having a coding region encoding enzymatically active hyaluronan synthase into a Bacillus strain, and culturing the Bacillus strain under conditions appropriate for the production of hyaluronic acid.

Abstract: The present invention relates to a recombinantly produced, enzymatically active hyaluronan synthase, wherein the recombinantly produced, enzymatically active hyaluronan synthase is a single protein that is a dual-action catalyst that utilizes UDP-GlcA and UDP-GlcNAc to synthesize HA. The recombinantly produced, enzymatically active hyaluronan synthase may be produced from a hyaluronan synthase gene isolated from a microbial source, such as a streptococcal source.

Abstract: The present invention relates to a recombinant host cell that includes an expression construct having a hyaluronan synthase gene that encodes an enzymatically active hyaluronan synthase (HAS), and to the use of these recombinant cells that produce hyaluronan synthase and its hyaluronic acid product.

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronate synthase (HAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active Streptococcus equisimilis hyaluronate synthase (seHAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: A functionally active hyaluronan synthase having at least one modified amino acid residue therein as compared to a corresponding functionally active native hyaluronan synthase such that the functionally active hyaluronan synthase has an altered enzymatic activity as compared to the corresponding functionally active native hyaluronan synthase is disclosed. Methods of producing hyaluronic acid utilizing a recombinant host cell having an expression construct encoding the functionally active hyaluronan synthase with altered enzymatic activity are also disclosed.

Abstract: The present invention relates to a recombinant Bacillus host cell containing a recombinant vector including a nucleic acid segment having a coding region segment encoding enzymatically active hyaluronan synthase (HAS). The recombinant Bacillus host cell is utilized in a method for producing hyaluronic acid (HA).

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active Streptococcus equisimilis hyaluronate synthase (seHAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active Streptococcus equisimilis hyaluronate synthase (seHAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active Streptococcus equisimilis hyaluronate synthase (seHAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: Disclosed are DNA sequences encoding hyaluronic acid synthase that are employed to construct recombinant cells useful in the production of hyaluronata synthase and hyaluronic acid (HA). In preferred aspects, chromosomal DNA encoding the HA synthase gene, hasA, was cloned from a Streptococcus pyoganas genomic library. These vectors were used to transform host cells such as E. coli and acapsular Streptococci to produce hyaluronic acid. Resultant transformants were screened to identify colonies which have incorporated HA synthase DNA in a form that is being actively transcribed into the corresponding HA synthase enzyme. These colonies were selected and employed in the production of hyaluronic acid.

Abstract: The present invention relates to a nucleic acid segment having a coding region segment encoding enzymatically active Streptococcus equisimilis hyaluronate synthase (seHAS), and to the use of this nucleic acid segment in the preparation of recombinant cells which produce hyaluronate synthase and its hyaluronic acid product. Hyaluronate is also known as hyaluronic acid or hyaluronan.

Abstract: A purified nucleic acid segment encoding a functionally active HARE or an active peptide fragment thereof, and methods for producing functionally active HARE or an active peptide fragment thereof therefrom, wherein the functionally active HARE or an active peptide fragment thereof is able to specifically bind HA, chondroitin and chondroitin sulfate.