Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6002
Number of amino acids:92
Molecular Weight:9177.72 Da
Theoretical pI:8.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1617.39%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)22.17%
Aspartic Acid ASP (D)33.26%
Glycine GLY (G)44.35%
Phynylalanine PHE (F)11.09%
Isoleucine ILE (I)33.26%
Histidine HIS (H)00%
Lysine LYS (K)66.52%
Methionine MET (M)22.17%
Leucine LEU (L)99.78%
Asparagine ASN (N)33.26%
Glutamine GLN (Q)11.09%
Proline PRO (P)55.43%
Serine SER (S)1516.3%
Arginine ARG (R)33.26%
Threonine THR (T)44.35%
Tryptophan TRP (W)00%
Valine VAL (V)77.61%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC385
HydrogenH657
NitrogenN111
OxygenO126
SulphurS10

FormulaC385H657N111O126S10
Total Number of Atoms:1289


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):5
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    500
Absorption 0.1% (=1 g/l)    0.054,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.011

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.59

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.74, 29.35, 31.52]

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:90.3261
Grand average of hydropathicity (GRAVY):0.43