Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3906
Number of amino acids:92
Molecular Weight:9147.47 Da
Theoretical pI:9.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1516.3%
Cysteine CYS (C)88.7%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)22.17%
Glycine GLY (G)1111.96%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)55.43%
Histidine HIS (H)00%
Lysine LYS (K)44.35%
Methionine MET (M)00%
Leucine LEU (L)44.35%
Asparagine ASN (N)66.52%
Glutamine GLN (Q)11.09%
Proline PRO (P)44.35%
Serine SER (S)1010.87%
Arginine ARG (R)88.7%
Threonine THR (T)66.52%
Tryptophan TRP (W)00%
Valine VAL (V)66.52%
Tyrosine TYR (Y)22.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC376
HydrogenH639
NitrogenN127
OxygenO122
SulphurS8

FormulaC376H639N127O122S8
Total Number of Atoms:1272


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):2
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    3480
Absorption 0.1% (=1 g/l)    0.380,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.326,   assuming all CYS residues are reduced
Aromaticity:0.022

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.48, 33.70, 20.65]

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:73.3695
Grand average of hydropathicity (GRAVY):0.01