Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4368
Number of amino acids:227
Molecular Weight:24424.35 Da
Theoretical pI:8.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.49%
Cysteine CYS (C)41.76%
Glutamic Acid GLU (E)31.32%
Aspartic Acid ASP (D)146.17%
Glycine GLY (G)208.81%
Phynylalanine PHE (F)167.05%
Isoleucine ILE (I)219.25%
Histidine HIS (H)41.76%
Lysine LYS (K)146.17%
Methionine MET (M)10.44%
Leucine LEU (L)208.81%
Asparagine ASN (N)156.61%
Glutamine GLN (Q)52.2%
Proline PRO (P)198.37%
Serine SER (S)156.61%
Arginine ARG (R)52.2%
Threonine THR (T)52.2%
Tryptophan TRP (W)00%
Valine VAL (V)219.25%
Tyrosine TYR (Y)83.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1129
HydrogenH1752
NitrogenN284
OxygenO310
SulphurS5

FormulaC1129H1752N284O310S5
Total Number of Atoms:3480


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):17
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    12170
Absorption 0.1% (=1 g/l)    0.498,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.488,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.89, 30.40, 18.06]

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:104.758
Grand average of hydropathicity (GRAVY):0.27