Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1110
Number of amino acids:148
Molecular Weight:16098.39 Da
Theoretical pI:7.91


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)85.41%
Cysteine CYS (C)149.46%
Glutamic Acid GLU (E)42.7%
Aspartic Acid ASP (D)85.41%
Glycine GLY (G)128.11%
Phynylalanine PHE (F)64.05%
Isoleucine ILE (I)64.05%
Histidine HIS (H)53.38%
Lysine LYS (K)74.73%
Methionine MET (M)32.03%
Leucine LEU (L)138.78%
Asparagine ASN (N)64.05%
Glutamine GLN (Q)42.7%
Proline PRO (P)64.05%
Serine SER (S)1711.49%
Arginine ARG (R)74.73%
Threonine THR (T)96.08%
Tryptophan TRP (W)00%
Valine VAL (V)74.73%
Tyrosine TYR (Y)64.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC689
HydrogenH1084
NitrogenN196
OxygenO215
SulphurS17

FormulaC689H1084N196O215S17
Total Number of Atoms:2201


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):12
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    9815
Absorption 0.1% (=1 g/l)    0.610,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    0.555,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.68

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.68, 27.70, 18.92]

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:69.1892
Grand average of hydropathicity (GRAVY):-0.11