Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5822
Number of amino acids:320
Molecular Weight:36118.59 Da
Theoretical pI:9.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)123.75%
Cysteine CYS (C)51.56%
Glutamic Acid GLU (E)206.25%
Aspartic Acid ASP (D)113.44%
Glycine GLY (G)216.56%
Phynylalanine PHE (F)165%
Isoleucine ILE (I)3711.56%
Histidine HIS (H)30.94%
Lysine LYS (K)3210%
Methionine MET (M)20.63%
Leucine LEU (L)247.5%
Asparagine ASN (N)299.06%
Glutamine GLN (Q)195.94%
Proline PRO (P)185.63%
Serine SER (S)175.31%
Arginine ARG (R)72.19%
Threonine THR (T)165%
Tryptophan TRP (W)00%
Valine VAL (V)175.31%
Tyrosine TYR (Y)144.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1636
HydrogenH2595
NitrogenN427
OxygenO478
SulphurS7

FormulaC1636H2595N427O478S7
Total Number of Atoms:5143


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):31
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    21110
Absorption 0.1% (=1 g/l)    0.584,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20860
Absorption 0.1% (=1 g/l)    0.578,   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 : 30.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.75, 26.56, 18.12]

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:93.5
Grand average of hydropathicity (GRAVY):-0.35