Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5904
Number of amino acids:307
Molecular Weight:32764.2 Da
Theoretical pI:8.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.21%
Cysteine CYS (C)144.56%
Glutamic Acid GLU (E)92.93%
Aspartic Acid ASP (D)123.91%
Glycine GLY (G)3210.42%
Phynylalanine PHE (F)144.56%
Isoleucine ILE (I)144.56%
Histidine HIS (H)41.3%
Lysine LYS (K)154.89%
Methionine MET (M)92.93%
Leucine LEU (L)258.14%
Asparagine ASN (N)103.26%
Glutamine GLN (Q)113.58%
Proline PRO (P)61.95%
Serine SER (S)4514.66%
Arginine ARG (R)103.26%
Threonine THR (T)258.14%
Tryptophan TRP (W)00%
Valine VAL (V)216.84%
Tyrosine TYR (Y)154.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1426
HydrogenH2249
NitrogenN381
OxygenO456
SulphurS23

FormulaC1426H2249N381O456S23
Total Number of Atoms:4535


Total number of positively charged residues (ARG + LYS):25
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    23225
Absorption 0.1% (=1 g/l)    0.709,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22350
Absorption 0.1% (=1 g/l)    0.682,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.99, 30.29, 19.22]

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:74.5928
Grand average of hydropathicity (GRAVY):0.03