Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5580
Number of amino acids:213
Molecular Weight:22410.82 Da
Theoretical pI:5.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2411.27%
Cysteine CYS (C)94.23%
Glutamic Acid GLU (E)125.63%
Aspartic Acid ASP (D)94.23%
Glycine GLY (G)167.51%
Phynylalanine PHE (F)83.76%
Isoleucine ILE (I)136.1%
Histidine HIS (H)62.82%
Lysine LYS (K)115.16%
Methionine MET (M)52.35%
Leucine LEU (L)219.86%
Asparagine ASN (N)115.16%
Glutamine GLN (Q)52.35%
Proline PRO (P)177.98%
Serine SER (S)167.51%
Arginine ARG (R)52.35%
Threonine THR (T)104.69%
Tryptophan TRP (W)00%
Valine VAL (V)136.1%
Tyrosine TYR (Y)20.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC985
HydrogenH1579
NitrogenN267
OxygenO300
SulphurS14

FormulaC985H1579N267O300S14
Total Number of Atoms:3145


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3480
Absorption 0.1% (=1 g/l)    0.155,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.133,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.76, 28.17, 29.11]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:91.2207
Grand average of hydropathicity (GRAVY):0.10