Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1281
Number of amino acids:95
Molecular Weight:11005.62 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)44.21%
Cysteine CYS (C)77.37%
Glutamic Acid GLU (E)88.42%
Aspartic Acid ASP (D)11.05%
Glycine GLY (G)77.37%
Phynylalanine PHE (F)33.16%
Isoleucine ILE (I)33.16%
Histidine HIS (H)11.05%
Lysine LYS (K)44.21%
Methionine MET (M)55.26%
Leucine LEU (L)66.32%
Asparagine ASN (N)33.16%
Glutamine GLN (Q)1515.79%
Proline PRO (P)22.11%
Serine SER (S)66.32%
Arginine ARG (R)1010.53%
Threonine THR (T)33.16%
Tryptophan TRP (W)00%
Valine VAL (V)55.26%
Tyrosine TYR (Y)22.11%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC457
HydrogenH751
NitrogenN149
OxygenO143
SulphurS12

FormulaC457H751N149O143S12
Total Number of Atoms:1512


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):9
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    3355
Absorption 0.1% (=1 g/l)    0.305,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.271,   assuming all CYS residues are reduced
Aromaticity:0.053

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 74.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.00, 18.95, 24.21]

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:56.421
Grand average of hydropathicity (GRAVY):-0.78